View source for Soviet space program

{{pp|small=yes}}
{{Short description|Space exploration program conducted by the Soviet Union from 1951 to 1991}}
{{Use American English|date=July 2019}}
{{Use mdy dates|date=October 2020}}
{{Infobox space program by country
| name = Soviet space program 
| native_name = 
| native_name_a = {{langx|ru|Космическая программа СССР|Kosmicheskaya programma SSSR}}
| image = Roscosmos First Satellite documentary.ogv
| image_size = 
| caption = Launch of the first successful artificial satellite, [[Sputnik-1]], from [[R-7 Semyorka|R-7 platform]] in 1957
| formed = 1951
| dissolved = December 1, 1991<ref name="zavtra">[http://zavtra.ru/content/view/polveka-bez-korolyova/ Полвека без Королёва], zavtra.ru. {{Webarchive|url=https://web.archive.org/20160628043911/http://zavtra.ru/content/view/polveka-bez-korolyova/ |date=28 June 2016 }}.</ref><ref>{{Cite wikisource |title=Resolution of the State Council of the Soviet Union of 14 November 1991 No. 13 |wslink=Постановление Государственного Совета СССР от 14.11.1991 № 13 |wslanguage=ru}}</ref>
| manager = {{Unbulleted list
  | [[Sergei Korolev]] (1951–66)
  | [[Vasily Mishin]] (1966–74)
  | [[Valentin Glushko]] (1974–89)
  }}
| key_people = [[OKB|Design Bureaus]]
| spaceport =  {{Unbulleted list
  | [[Baikonur Cosmodrome]]
  | [[Plesetsk Cosmodrome]]
  }}
| firstflight = [[Sputnik 1]]<br />(October 4, 1957) 
| firstcrewed = [[Vostok 1]]<br />(April 12, 1961)
| lastflight = 
| lastcrewed = [[Soyuz TM-13]]<br />(October 2, 1991)
| success = [[#Projects and accomplishments|See accomplishments]]
| failure = [[#Incidents, failures, and setbacks|See failures below]]
| partial = [[#Canceled projects|See partial or cancelled projects]]<br>[[Soviet crewed lunar programs|Soviet lunar program]]
| other_outcome =[[Intercosmos]] 
| landing =
}}
{{Soviet space program sidebar}}
[[File:Yuri_Gagarin_(1961)_-_Restoration.jpg|thumb|Soviet cosmonaut [[Yuri Gagarin]]—the first person in [[outer space]]]]
The '''Soviet space program'''<ref>{{cite book |last1=Reichl |first1=Eugen |title=The Soviet Space Program: The Lunar Mission Years: 1959–1976 |date=2019 |publisher=Schiffer Publishing, Limited |location=Atglen, PA |isbn=978-0-7643-5675-9 |pages=160 |url=https://books.google.com/books?id=O-HnuwEACAAJ |access-date=22 May 2022 |language=en}}</ref> ({{langx|ru|Космическая программа СССР|Kosmicheskaya programma SSSR}}) was the state [[space program]] of the [[Soviet Union]], active from 1951 until the [[dissolution of the Soviet Union]] in 1991.<ref>{{Cite web | url=https://www.rmg.co.uk/stories/topics/space-race-timeline | title=Space Race Timeline }}</ref><ref>{{Cite web |url=http://www.rusconstitution.ru/library/constitution/articles/9660/ |title=2 апреля 1955 года «Об образовании общесоюзного Министерства общего машиностроения СССР» |access-date=2016-05-03 |archive-date=2016-06-10 |archive-url=https://web.archive.org/web/20160610100216/http://www.rusconstitution.ru/library/constitution/articles/9660/ |url-status=live }}</ref><ref>[http://www.aif.ru/society/science/1313783 Вертикальная структура: как реорганизуется космическая отрасль России], [[Аргументы и факты|АиФ]]. {{Webarchive|url=https://web.archive.org/20160530161535/http://www.aif.ru/society/science/1313783 |date=30 May 2016 }}.</ref> Contrary to its competitors ([[NASA]] in the United States, the [[European Space Agency]] in Western Europe, and the [[Ministry of Aerospace Industry]] in China), which had their programs run under single coordinating agencies, the Soviet space program was divided between several internally competing [[OKB|design bureaus]] led by [[Sergei Korolev|Korolev]], [[Kerim Kerimov|Kerimov]], [[Mstislav Keldysh|Keldysh]], [[Mikhail Yangel|Yangel]], [[Valentin Glushko|Glushko]], [[Vladimir Chelomey|Chelomey]], [[Viktor Makeyev|Makeyev]], [[Boris Chertok|Chertok]] and [[Information Satellite Systems Reshetnev|Reshetnev]].<ref>{{cite web|url=https://www.groundzerobooksltd.com/pages/books/80639/union-of-soviet-socialist-republics/postal-stationery-russia-airmail-envelope-with-depiction-of-the-earth-being-orbited-and-four-gold |title=Postal Stationery Russia Airmail Envelope with Depiction of the Earth Being Orbited and Four Gold Stars  | website=groundzerobooksltd.com|access-date=2021-08-18}}</ref> Several of these bureaus were subordinated to the [[Ministry of General Machine-Building]]. The Soviet space program served as an important marker of claims by the Soviet Union to its [[superpower]] status.<ref name="University of Pittsburgh Press, Siddiqi & Andrews, 2011">{{Cite book|title=Into the Cosmos: Space Exploration and Soviet Culture|isbn=978-0-8229-7746-9|access-date=2016-01-19|last1=Andrews|first1=James T.|last2=Siddiqi|first2=Asif A.|date=2011|publisher=University of Pittsburgh Press|url=https://books.google.com/books?id=W7oRuOZbb8IC|language=en}}</ref>{{rp|1}}

[[Soviet rocketry|Soviet investigations into rocketry]] began with the formation of the [[Gas Dynamics Laboratory]] in 1921, and these endeavors expanded during the 1930s and 1940s.{{sfn|Chertok|2005|pp=9–10, 164–165 Vol 1}}{{sfn|Siddiqi|2000|pp=6–14}} In the years following [[World War II]], both the Soviet and [[United States space program]]s utilised German technology in their early efforts at space programs. In the 1950s, the Soviet program was formalized under the management of [[Sergei Korolev]], who led the program based on unique concepts derived from [[Konstantin Tsiolkovsky]], sometimes known as the father of theoretical [[astronautics]].<ref>{{cite web|url=http://www.aiaa.org/index.cfm|archive-url=https://web.archive.org/web/20120104012817/http://www.aiaa.org/index.cfm|url-status=dead|title=Home &#124; AIAA|archive-date=January 4, 2012}}</ref>

Competing in the [[Space Race]] [[NASA|with the United States]] and later [[European Space Agency|with the European Union]] and [[Ministry of Aerospace Industry|with China]], the Soviet space program was notable in setting many records in space exploration, including the first intercontinental missile ([[R-7 Semyorka]]) that launched the first satellite ([[Sputnik 1]]) and sent the first animal ([[Laika]]) into [[Geocentric orbit|Earth orbit]] in 1957, and placed the first human in space in 1961, [[Yuri Gagarin]]. In addition, the Soviet program also saw the first woman in space, [[Valentina Tereshkova]], in 1963 and the [[List of spacewalks and moonwalks 1965–1999|first spacewalk]] in 1965. Other milestones included [[Cybernetics in the Soviet Union|computerized robotic]] missions [[Luna programme|exploring the Moon]] starting in 1959: being the first to [[Moon landing|reach the surface of the Moon]], recording the first image of the [[far side of the Moon]], and achieving the first soft landing on the Moon. The Soviet program also achieved the first space rover deployment with the [[Lunokhod programme]] in 1966, and sent the first robotic probe that automatically extracted a sample of [[lunar soil]] and brought it to Earth in 1970, [[Luna 16]].<ref>{{cite web|url=https://www.cnn.com/2012/11/26/world/gallery/space-firsts/index.html |title=Famous firsts in space 
 |website=CNN| publisher = Cable News Network | date=2021-04-09 | access-date=2022-05-13}}</ref><ref>[https://wayback.archive-it.org/all/20201020233802/http://www.astronautix.com/r/r-7.html Article title]</ref> The Soviet program was also responsible for leading the first [[interplanetary probe]]s to [[Venera|Venus]] and [[Mars program|Mars]] and made successful soft landings on these planets in the 1960s and 1970s.<ref>{{cite web|url=https://astronomy.com/news/2020/08/interplanetary-probes-from-behind-the-iron-curtain-the-soviet-venera-program|title=Behind the Iron Curtain: The Soviet Venera program|date=August 26, 2020 }}</ref> It put the first [[space station]], [[Salyut 1]], into [[low Earth orbit]] in 1971, and the first modular space station, [[Mir]], in 1986.<ref>{{cite web|author=Brian Dunbar |url=https://www.nasa.gov/feature/50-years-ago-launch-of-salyut-the-world-s-first-space-station |title=50 Years Ago: Launch of Salyut, the World's First Space Station |website=NASA.gov | publisher = National Aeronautics and Space Administration| date=2021-04-19 |archive-url=https://web.archive.org/web/20220331115352/https://www.nasa.gov/feature/50-years-ago-launch-of-salyut-the-world-s-first-space-station  | archive-date=2022-03-31  | access-date=2022-05-13}}</ref> Its [[Interkosmos]] program was also notable for sending the first citizen of a country other than the United States or Soviet Union into space.<ref name="Sheehan">{{cite book|last=Sheehan|first=Michael|title=The international politics of space|year=2007|publisher=Routledge|isbn=978-0-415-39917-3|url=https://books.google.com/books?id=V-Z0kfqPHy8C|location=London|pages=59–61}}</ref><ref name="Burgess">{{cite book|last1=Burgess|first1=Colin |last2=Hall|first2=Rex |title=The first Soviet cosmonaut team: their lives, legacy, and historical impact|year=2008|publisher=Springer|isbn=978-0-387-84823-5|url=https://books.google.com/books?id=rrdVPtCNL9AC|location=Berlin|page=331}}</ref>

The primary spaceport, [[Baikonur Cosmodrome]], is now in [[Kazakhstan]], which leases the facility to Russia.<ref>http://www.roscosmos.ru/index.asp?Lang=ENG {{webarchive|url=https://web.archive.org/web/20081019125808/http://www.roscosmos.ru/index.asp?Lang=ENG|date=October 19, 2008}}</ref><ref>{{cite web |title=Russian Right Stuff DVD Set Space Program Secret History 2 Discs |url=https://www.mediaoutlet.com/outer-space-dvds-c-1_3_24/russian-right-stuff-dvd-set-space-program-secret-history-2-discs-p-1331.html |access-date=2021-08-18 |website=mediaoutlet.com}}</ref>

==Origins==

===Early Russian-Soviet efforts===
[[File:GIRD.jpg|thumb|Members of the Group for the Study of Reactive Motion (GIRD). 1931. Left to right: standing I.P. Fortikov, Yu A Pobedonostsev, Zabotin; sitting: A. Levitsky, Nadezhda Sumarokova, [[Sergei Korolev]], [[Boris Cheranovsky]], [[Friedrich Zander]] ]]
{{further|Soviet rocketry}}
The theory of [[space exploration]] had a solid basis in the [[Russian Empire]] before the [[First World War]] with the writings of the Russian and Soviet rocket scientist [[Konstantin Tsiolkovsky]] (1857–1935), who published pioneering papers in the late 19th and early 20th centuries on [[Astronautics|astronautic theory]], including calculating the [[Rocket equation]] and in 1929 introduced the concept of the [[multistaged rocket]].{{sfn|Siddiqi|2000|pp=1–2}}{{sfn|Baker|Zak|2013|p=3}}<ref>{{cite web |title=Konstantin Tsiolkovsky Brochures |url=https://sirismm.si.edu/EADpdfs/NASM.2000.0015.pdf |website=Smithsonian National Air and Space Museum |access-date=21 May 2022}}</ref> Additional astronautic and [[spaceflight]] theory was also provided by the Ukrainian and Soviet engineer and mathematician [[Yuri Kondratyuk]] who developed the first known [[lunar orbit rendezvous]] (LOR), a key concept for landing and return spaceflight from Earth to the [[Moon]].<ref>
{{Cite book
|last = Wilford
|first = John
|author-link = John Noble Wilford
|title = We Reach the Moon; the New York Times Story of Man's Greatest Adventure
|publisher = Bantam Paperbacks
|location = New York
|year = 1969
|page = 167
|id = {{Listed Invalid ISBN|0-373-06369-0}} }}
</ref><ref>{{cite book|title=Russian Planetary Exploration: History, Development, Legacy and Prospects|first=Brian|last=Harvey|year=2007|publisher=Springer}}</ref> The LOR was later used for the plotting of the first actual [[Apollo 11|human spaceflight to the Moon]]. Many other aspects of spaceflight and [[space exploration]] are covered in his works.{{sfn|Siddiqi|2000|p=2}} Both theoretical and practical aspects of spaceflight was also provided by the Latvian pioneer of [[rocket]]ry and [[spaceflight]] [[Friedrich Zander]],{{sfn|Siddiqi|2000|p=3}} including suggesting in a 1925 paper that a spacecraft traveling between two planets could be accelerated at the beginning of its trajectory and decelerated at the end of its trajectory by using the gravity of the two planets' moons – a method known as [[gravity assist]].<ref>Zander's 1925 paper, [https://archive.org/details/nasa_techdoc_19650001039 “Problems of flight by jet propulsion: interplanetary flights,”] was translated by NASA. See NASA Technical Translation F-147 (1964); specifically, Section 7: Flight Around a Planet's Satellite for Accelerating or Decelerating Spaceship, pp. 290–292.</ref>

====Gas Dynamics Laboratory (GDL)====
{{main|Gas Dynamics Laboratory}}
The first Soviet development of rockets was in 1921, when the Soviet military sanctioned the commencement of a small research laboratory to explore [[Solid-fuel rocket|solid fuel rockets]], led by [[Nikolai Tikhomirov (chemical engineer)|Nikolai Tikhomirov]], a chemical engineer, and supported by [[Vladimir Artemyev]], a Soviet engineer.{{sfn|Siddiqi|2000|p=6}}{{sfn|Chertok|2005|p=164 Vol 1}}  Tikhomirov had commenced studying solid and [[Liquid-fueled rocket]]s in 1894, and in 1915, he lodged a patent for "self-propelled aerial and water-surface mines."<ref name="RSB_GDL" /> In 1928 the laboratory was renamed the [[Gas Dynamics Laboratory]] (GDL).<ref name="W&WRRP">{{cite web |title=Russian Rocket Projectiles – WWII |url=https://weaponsandwarfare.com/2018/11/19/russian-rocket-projectiles-wwii/ |website=Weapons and Warfare |date=November 18, 2018 |access-date=29 May 2022}}</ref> The First test-firing of a solid fuel rocket was carried out in March 1928, which flew for about 1,300 meters<ref name="RSB_GDL">{{cite web |last1=Zak |first1=Anatoly |title=Gas Dynamics Laboratory |url=http://www.russianspaceweb.com/gdl.html |website=Russian Space Web |access-date=29 May 2022}}</ref>  Further developments in the early 1930s were led by [[Georgy Langemak]].{{sfn|Siddiqi|2000|p=17}} and 1932 in-air test firings of [[RS-82 (rocket family)|RS-82]] unguided rockets from an [[Tupolev I-4]] aircraft armed with six launchers successfully took place.{{sfn|Chertok|2005|p=165 Vol 1}}

====Sergey Korolev====
{{main|Sergey Korolev}}
A key contributor to early soviet efforts came from a young Russian aircraft engineer [[Sergey Korolev]], who would later become the de facto head of the Soviet space programme.{{sfn|Siddiqi|2000|p=4}} 
In 1926, as an advanced student, Korolev was mentored by the famous Soviet aircraft designer [[Andrey Tupolev]], who was a professor at his University.<ref name="Eng060121">{{cite web |title=Late great engineers: Sergei Korolev – designated designer |url=https://www.theengineer.co.uk/content/in-depth/late-great-engineers-sergei-korolev-designated-designer |website=The Engineer |date=June 2021 |access-date=22 May 2022}}</ref> In 1930, while working as a lead engineer on the [[Tupolev TB-3]] heavy bomber he became interested in the possibilities of liquid-fueled rocket engines to propel airplanes. This led to contact with Zander, and sparked his interest in space exploration and rocketry.{{sfn|Siddiqi|2000|p=4}}

====Group for the Study of Reactive Motion (GIRD)====
[[File:Ракета 09 и 10.jpg|thumb|upright=0.8|Rocket 09 (left) and 10 (GIRD-09 and GIRD-X). Museum of Cosmonautics and Rocket Technology; St. Petersburg.]]
{{main|Group for the Study of Reactive Motion}}
Practical aspects built on early experiments carried out by members of the 'Group for the Study of Reactive Motion' (better known by its Russian acronym "[[GIRD]]") in the 1930s, where Zander, Korolev and other pioneers such as the Russian engineers [[Mikhail Tikhonravov]], [[Leonid Dushkin]], [[Vladimir Vetchinkin]] and Yuriy Pobedonostsev worked together.{{sfn|Siddiqi|2000|pp=4–5}}{{sfn|Baker|Zak|2013|p=6}}{{sfn|Chertok|2005|p=166 Vol 1}} On August 18, 1933, the Leningrad branch of GIRD, led by Tikhonravov,{{sfn|Baker|Zak|2013|p=6}} launched the first [[Hybrid-propellant rocket|hybrid propellant rocket]], the [[Group for the Study of Reactive Motion#GIRD-9|GIRD-09]],<ref>{{cite journal |last1=Okninski |first1=Adam |title=Hybrid rocket propulsion technology for space transportation revisited – propellant solutions and challenges |journal=FirePhysChem |date=December 2021 |volume=1 |issue=4 |pages=260–271 |doi=10.1016/j.fpc.2021.11.015 |s2cid=244899773 |doi-access=free |bibcode=2021FPhCh...1..260O }}</ref> and on November 25, 1933, the Soviet's first liquid-fueled rocket [[GIRD-X]].<ref>{{cite web |title=GIRD (Gruppa Isutcheniya Reaktivnovo Dvisheniya) |url=http://weebau.com/rock_rus/gird.htm |website=WEEBAU |access-date=26 July 2022}}</ref>

====Reactive Scientific Research Institute (RNII)====
{{main|Reactive Scientific Research Institute}}
In 1933 GIRD was merged with GDL<ref name="RSB_GDL" /> by the Soviet government to form the [[Reactive Scientific Research Institute]] (RNII),{{sfn|Baker|Zak|2013|p=6}} which brought together the best of the Soviet rocket talent, including Korolev, Langemak, [[Ivan Kleymyonov]] and former GDL engine designer [[Valentin Glushko]].{{sfn|Siddiqi|2000|pp=7–8}}{{sfn|Baker|Zak|2013|p=9}} Early success of RNII included the conception in 1936 and first flight in 1941 of the [[Korolyov RP-318|RP-318]] the Soviets first [[Korolyov RP-318|rocket-powered aircraft]] and the [[RS-82 (rocket family)|RS-82 and RS-132 missiles]] entered service by 1937,{{sfn|Chertok|2005|p=167 vol 1}} which became the basis for development in 1938 and serial production from 1940 to 1941 of the [[Katyusha rocket launcher|Katyusha multiple rocket launcher]], another advance in the reactive propulsion field.<ref>{{cite journal |last1=Pobedonostsev |first1=Yuri A. |title=On the History of the Development of Solid-Propellant Rockets in the Soviet Union |journal=NASA Conference Publication |date=1977 |pages=59–63 |url=https://books.google.com/books?id=ruQqAAAAIAAJ |publisher=National Aeronautics and Space Administration, Scientific and Technical Information Office |language=en}}</ref><ref>{{cite web |title=Greatest World War II Weapons : The Fearsome Katyusha Rocket Launcher |url=https://defencyclopedia.com/2016/02/20/greatest-world-war-ii-weapons-the-fearsome-katyusha-rocket-launcher/ |website=Defencyclopidea |date=February 20, 2016 |access-date=20 May 2022}}</ref>{{sfn|Siddiqi|2000|p=9}} RNII's research and development were very important for later achievements of the Soviet rocket and space programs.{{sfn|Siddiqi|2000|p=9}}{{sfn|Chertok|2005|p=164 Vol 1}}

During the 1930s, Soviet rocket technology was comparable to Germany's,{{sfn|Chertok|2005|pp=167–168 Vol 1}} but [[Joseph Stalin]]'s [[Great Purge]] severely damaged its progress. In November 1937, Kleymyonov and Langemak were arrested and later executed, Glushko and many other leading engineers were imprisoned in the [[Gulag]].{{sfn|Siddiqi|2000|pp=10–11}} Korolev was arrested in June 1938 and sent to a [[Sevvostlag|forced labour camp in Kolyma]] in June 1939. However, due to intervention by Tupolev, he was relocated to a [[Sharashka|prison for scientists and engineers]] in September 1940.{{sfn|Siddiqi|2000|pp=11–14}}

===World War II===
During World War II rocketry efforts were carried out by three Soviet [[OKB|design bureaus]].{{sfn|Siddiqi|2000|p=22}} RNII continued to develop and improve solid fuel rockets, including the RS-82 and RS-132 missiles and the Katyusha rocket launcher,{{sfn|Siddiqi|2000|p=17}} where Pobedonostsev and Tikhonravov continued to work on rocket design.<ref>{{cite web |title=Tikhonravov, Mikhail Klavdievich |url=http://www.russianspaceweb.com/tikhonravov.html |website=Russian Space Web |access-date=29 May 2022}}</ref>{{sfn|Chertok|2005|p=207 Vol 1}} In 1944, RNII was renamed Scientific Research Institute No 1 (NII-I) and combined with design bureau OKB-293, led by Soviet engineer [[Viktor Bolkhovitinov]], which developed, with [[Aleksei Isaev]], [[Boris Chertok]], [[Leonid Voskresensky]] and [[Nikolay Pilyugin]] a short-range rocket powered interceptor called [[Bereznyak-Isayev BI-1]].{{sfn|Chertok|2005|pp=174, 207 Vol 1}}
[[File:Bereznyak-Isayev-1.jpg|thumb|The [[Bereznyak-Isayev BI-1|Bereznyak-Isayev BI-1 rocket powered interceptor]] was an early advancement in [[Soviet rocketry]] technology.]]
Special Design Bureau for Special Engines (OKB-SD) was led by Glushko and focused on developing auxiliary [[Liquid rocket|liquid-fueled rocket engines]] to [[JATO|assist takeoff]] and climbing of prop aircraft, including the RD-IKhZ, RD-2 and RD-3.{{sfn|Siddiqi|2000|p=15}} In 1944, the RD-1&nbsp;kHz auxiliary rocket motor was tested in a fast-climb [[La-7#La-7R|Lavochkin La-7R]] for protection of the capital from high-altitude ''Luftwaffe'' attacks.<ref>{{cite journal|date=November 1976|title=Last of the Wartime Lavochkins|journal=[[Air International]] |location=Bromley, Kent|volume=11|issue=5|pages=245–246}}</ref> In 1942 Korolev was transferred to OKB-SD, where he proposed development of the long range missiles D-1 and D-2.{{sfn|Siddiqi|2000|pp=15–17}}

The third design bureau was [[NPO Mashinostroyeniya|Plant No 51 (OKB-51)]], led by Soviet Ukrainian Engineer [[Vladimir Chelomey]], where he created the first Soviet [[Pulse jet engine|pulsating air jet]] engine in 1942, independently of similar contemporary developments in [[Nazi Germany]].{{sfn|Siddiqi|2000|pp=21–22}}<ref>{{cite web |title=Vladimir Nikolayevich |url=http://www.astronautix.com/c/chelomei.html |website=astronautix |access-date=29 May 2022}}</ref>

=== German influence ===
{{main|German influence on Soviet rocketry}}

During World War II, Nazi Germany developed rocket technology that was more advanced than the [[Allies of World War II|Allies]] and a race commenced between the [[Soviet Union]] and the United States to capture and exploit the technology. Soviet rocket specialist was sent to Germany in 1945 to obtain [[V-2 rocket]]s and worked with German specialists in Germany and later in the Soviet Union to understand and replicate the rocket technology.{{sfn|Chertok|2005|pp=215–369 Vol 1}}{{sfn|Chertok|2005|pp=43–71 Vol 2}}{{sfn|Siddiqi|2000|pp=24–82}} The involvement of German scientists and engineers was an essential catalyst to early Soviet efforts. In 1945 and 1946 the use of German expertise was invaluable in reducing the time needed to master the intricacies of the V-2 rocket, establishing production of the [[R-1 rocket]] and enable a base for further developments. On 22 October 1946, 302 German rocket scientists and engineers, including 198 from the Zentralwerke (a total of 495 persons including family members), were deported to the Soviet Union as part of [[Operation Osoaviakhim]].<ref>{{cite web |last1=Zak |first1=Anatoly |title=Official decisions on the deportation of Germans |url=http://www.russianspaceweb.com/a4_team_moscow.html |access-date=3 July 2022 |website=Russian Space Web}}</ref>{{sfn|Siddiqi|2000|pp=37–42}}<ref>{{Cite web |last=Hebestreit |first=Gunther |title=Geheimoperation OSSAWIAKIM: Die Verschleppung deutscher Raketenwissenschaftler in die Sowjetunion |trans-title=Secret operation Ossawiakim: The relocation of German rocket scientists into the Soviet Union |url=https://www.institut-rabe.de/index.php/aktuelles?start=7 |url-status=live |archive-url=https://web.archive.org/web/20241204184928/https://www.institut-rabe.de/index.php/aktuelles?start=7 |archive-date=2024-12-04 |access-date=2022-09-29 |website=Förderverein Institut RaBe e.V. |quote=An order from Moscow was read to the people who had been awakened from their sleep, in which they were informed that the Zentralwerke were to be relocated to the Soviet Union, which affected both the facilities and equipment and the personnel.}}</ref> However, after 1947 the Soviets made very little use of German specialists and their influence on the future Soviet rocket program was marginal.{{sfn|Siddiqi|2000|pp=40, 63, 83–84}}

==Sputnik and Vostok==
[[Image:Korolev Kurchatov Keldysh.jpg|thumb|Chief Designer [[Sergei Korolev]] (left), with the father of the Soviet atomic bomb [[Igor Kurchatov]], and Chief Theoretician [[Mstislav Keldysh]] in 1956]]

The Soviet space program was tied to the USSR's [[Five-Year Plan (USSR)|Five-Year Plans]] and from the start was reliant on support from the Soviet military. Although he was "single-mindedly driven by the dream of space travel", Korolev generally kept this a secret while working on military projects—especially, after the Soviet Union's [[RDS-1|first atomic bomb test]] in 1949, a missile capable of carrying a nuclear warhead to the United States—as many mocked the idea of launching satellites and crewed spacecraft. Nonetheless, the first Soviet rocket with animals aboard launched in July 1951; the two dogs, [[Dezik and Tsygan]], were recovered alive after reaching 101&nbsp;km in altitude. Two months ahead of America's first such achievement, this and subsequent flights gave the Soviets valuable experience with [[space medicine]].{{r|siddiqi2000}}{{rp|84–88,95–96,118}}

Because of its global range and large payload of approximately five tons, the reliable R-7 was not only effective as a strategic delivery system for nuclear warheads, but also as an excellent basis for a space vehicle. The United States' announcement in July 1955 of its plan to launch a satellite during the [[International Geophysical Year]] greatly benefited Korolev in persuading Soviet leader [[Nikita Khrushchev]] to support his plans. {{r|siddiqi2000}}{{rp|148–151}} In a letter addressed to Khrushchev, Korolev stressed the necessity of launching a "simple satellite" in order to compete with the American space effort.<ref>{{Cite book|url=https://digitalarchive.wilsoncenter.org/document/165445|title=On Work to Create an Artificial Earth Satellite|last1=Korolev|first1=Sergei|last2=Riabikov|first2=Vasilii |publisher=Baturin|year=2008}}</ref> Plans were approved for Earth-orbiting satellites (''[[Sputnik]]'') to gain knowledge of space, and four uncrewed military reconnaissance satellites, [[Zenit (satellite)|Zenit]]. Further planned developments called for a crewed [[Geocentric orbit|Earth orbit]] flight by and an uncrewed lunar mission at an earlier date.<ref>{{cite web | url=https://spp.fas.org/eprint/lindroos_moon1.htm | title=The Soviet Manned Lunar Program }}</ref>

[[File:Sputnik asm.jpg|thumb|left|A replica of ''[[Sputnik 1]]'']]

After the first Sputnik proved to be successful, Korolev—then known publicly only as the anonymous "Chief Designer of Rocket-Space Systems"{{r|siddiqi2000}}{{rp|168–169}}—was charged to accelerate the crewed program, the design of which was combined with the Zenit program to produce the [[Vostok spacecraft]]. After Sputnik, Soviet scientists and program leaders envisioned establishing a crewed station to study the effects of zero-gravity and the long term effects on lifeforms in a space environment.<ref>M.K. Tikhonravov, ''Memorandum on an Artificial Earth Satellite,'' History and Public Policy Program Digital Archive, orig. May 26, 1954, Published in Raushenbakh, editor (1991), 5–15. Edited by Asif Siddiqi and translated by Gary Goldberg. https://digitalarchive.wilsoncenter.org/document/165393</ref> Still influenced by Tsiolkovsky—who had chosen Mars as the most important goal for space travel—in the early 1960s, the Soviet program under Korolev created substantial plans for crewed trips to Mars as early as 1968 to 1970. With [[Controlled Ecological Life Support System|closed-loop life support systems]] and electrical rocket engines, and launched from large orbiting space stations, these plans were much more ambitious than America's goal of [[Project Apollo|landing on the Moon]].{{r|siddiqi2000}}{{rp|333–337}}

In late 1963 and early 1964 the [[Polyot (satellite)|Polyot 1 and Polyot 2]] satellites were launched, these were the first satellites capable of adjusting both [[orbital inclination]] and [[Apsis]]. This marked a significant step in the potential use of spacecraft in [[Anti-satellite weapon|Anti-satellite]] warfare, as it demonstrated the potential to eventually for unmanned satellites to intercept and destroy other satellites. This would have highlighted the potential use of the space program in a conflict with the US.<ref>{{Cite web |title=The Historic Beginnings Of The Space Arms Race |url=https://www.spacewar.com/reports/The_Historic_Beginnings_Of_The_Space_Arms_Race_999.html |access-date=2024-11-21 |website=www.spacewar.com}}</ref><ref>{{Cite web |last1=RBTH |last2=Novosti |first2=Yury Zaitsev, RIA |date=2008-11-01 |title=The historic beginnings of the space arms race |url=https://www.rbth.com/articles/2008/11/01/311008_space.html |access-date=2024-11-21 |website=Russia Beyond |language=en-US}}</ref><ref>{{Cite web |date=2013-11-01 |title=The Hidden History of the Soviet Satellite-Killer |url=https://www.popularmechanics.com/space/satellites/a9620/the-hidden-history-of-the-soviet-satellite-killer-16108970/ |access-date=2024-11-21 |website=Popular Mechanics |language=en-US}}</ref>

===Funding and support===
[[File:Russia-Moscow-VDNH-Rocket R-7-1.jpg|thumb|upright|The [[Vostok (rocket family)|Vostok]] rocket at the [[Exhibition of Achievements of National Economy|VDNH]]]]

The Soviet space program was secondary in military funding to the [[Strategic Rocket Forces]]' ICBMs. While the West believed that Khrushchev personally ordered each new space mission for propaganda purposes, and the Soviet leader did have an unusually close relationship with Korolev and other chief designers, Khrushchev emphasized missiles rather than space exploration and was not very interested in competing with Apollo.{{r|siddiqi2000}}{{rp|351,408,426–427}}

While the government and the Communist Party used the program's successes as propaganda tools after they occurred, systematic plans for missions based on political reasons were rare, one exception being [[Valentina Tereshkova]], the first woman in space, on [[Vostok 6]] in 1963.{{r|siddiqi2000}}{{rp|351}} Missions were planned based on rocket availability or ad hoc reasons, rather than scientific purposes. For example, the government in February 1962 abruptly ordered an ambitious mission involving two Vostoks simultaneously in orbit launched "in ten days time" to eclipse [[John Glenn]]'s [[Mercury-Atlas 6]] that month; the program could not do so until August, with [[Vostok 3]] and [[Vostok 4]].{{r|siddiqi2000}}{{rp|354–361}}

==Internal competition==
Unlike the American space program, which had NASA as a single coordinating structure directed by its administrator, [[James E. Webb|James Webb]] through most of the 1960s, the USSR's program was split between several competing design groups. Despite the successes of the [[Sputnik program|Sputnik Program]] between 1957 and 1961 and [[Vostok programme|Vostok Program]] between 1961 and 1964, after 1958 Korolev's OKB-1 design bureau faced increasing competition from his rival chief designers, [[Mikhail Yangel]], [[Valentin Glushko]], and [[Vladimir Chelomei]]. Korolev planned to move forward with the [[Soyuz spacecraft|Soyuz]] craft and [[N1 rocket|N-1]] heavy booster that would be the basis of a permanent crewed space station and crewed exploration of the [[Moon]]. However, [[Dmitry Ustinov]] directed him to focus on near-Earth missions using the [[Voskhod spacecraft]], a modified Vostok, as well as on uncrewed missions to nearby planets [[Venus]] and [[Mars]].{{Citation needed|date=November 2024}}

Yangel had been Korolev's assistant but with the support of the military, he was given his own design bureau in 1954 to work primarily on the military space program. This had the stronger rocket engine design team including the use of [[hypergolic]] fuels but following the [[Nedelin catastrophe]] in 1960 Yangel was directed to concentrate on ICBM development. He also continued to develop his own heavy booster designs similar to Korolev's N-1 both for military applications and for cargo flights into space to build future space stations.{{Citation needed|date=November 2024}}

Glushko was the chief rocket engine designer but he had a personal friction with Korolev and refused to develop the large single chamber cryogenic engines that Korolev needed to build heavy boosters.{{Citation needed|date=November 2024}}

Chelomey benefited from the patronage of Khrushchev{{r|siddiqi2000}}{{rp|418}} and in 1960 was given the plum job of developing a rocket to send a crewed vehicle around the Moon and a crewed military space station. With limited space experience, his development was slow.{{Citation needed|date=November 2024}}

The progress of the Apollo program alarmed the chief designers, who each advocated for his own program as the response. Multiple, overlapping designs received approval, and new proposals threatened already approved projects. Due to Korolev's "singular persistence", in August 1964—more than three years after the United States declared its intentions—the Soviet Union finally decided to compete for the Moon. It set the goal of a lunar landing in 1967—the 50th anniversary of the [[October Revolution]]—or 1968.{{r|siddiqi2000}}{{rp|406–408, 420}} At one stage in the early 1960s the Soviet space program was actively developing multiple launchers and spacecraft. With the fall of Krushchev in 1964, Korolev was given complete control of the crewed program.<ref>{{cite web|author=Adam Mann |url=https://www.space.com/vostok-program.html |title=The Vostok Program: The Soviet's first crewed spaceflight program 
 |website=space.com | publisher =Future US, Inc. | date=July 28, 2020 | access-date=2023-03-03}}</ref><ref>{{cite web|author=Asif Siddiqi |url=https://www.smithsonianmag.com/air-space-magazine/apollo-why-the-soviets-lost-180972229/ |title=Why the Soviets Lost the Moon Race |website=smithsonianmag.com | publisher =Smithsonian Institution | date=June 2019 | access-date=2023-03-03}}</ref>

In 1961, [[Valentin Bondarenko]], a cosmonaut training for a crewed Vostok mission, was killed in an endurance experiment after the chamber he was in caught on fire. The Soviet Union chose to cover up his death and continue on with the space program.<ref>{{cite web|title=James Oberg's Pioneering Space|url=http://www.jamesoberg.com/usd10.html|access-date=2021-05-01|website=www.jamesoberg.com}}</ref>

=== After Korolev ===
[[Image:Proton Zvezda crop.jpg|thumb|left|upright|Launch of a [[Proton-K]]]]

Korolev died in January 1966 from complications of heart disease and severe hemorrhaging following a routine operation that uncovered [[colon cancer]]. [[Kerim Kerimov]],<ref>{{cite web|url= http://space.hobby.ru/baykonur/kerimov.html|title=Йепхл Юкхебхв Йепхлнб|language=ru|website=Space.hobby.ru|access-date=2016-01-19}}</ref> who had previously served as the head of the [[Strategic Rocket Forces]] and had participated in the State Commission for [[Vostok programme|Vostok]] as part of his duties,<ref>{{cite book|page=94|author=[[Asif Azam Siddiqi]]|title=Challenge to Apollo: The Soviet Union and the Space Race, 1945–1974|isbn=9780160613050|year=2000|publisher=[[NASA]]|url=https://books.google.com/books?id=5pQ9AQAAMAAJ}}</ref> was appointed Chairman of the State Commission on Piloted Flights and headed it for the next 25 years (1966–1991). He supervised every stage of development and operation of both crewed space complexes as well as uncrewed interplanetary stations for the former Soviet Union. One of Kerimov's greatest achievements was the launch of [[Mir]] in 1986.{{Citation needed|date=November 2024}}

The leadership of the OKB-1 design bureau was given to [[Vasily Mishin]], who had [[Soviet crewed lunar programs|the task of sending a human around the Moon in 1967 and landing a human on it in 1968]]. Mishin lacked Korolev's political authority and still faced competition from other chief designers. {{Citation needed|date=November 2024}} Under pressure, Mishin approved the launch of the [[Soyuz 1]] flight in 1967, even though the craft had never been successfully tested on an uncrewed flight. The mission launched with known design problems and ended with the vehicle crashing to the ground, killing [[Vladimir Komarov]]. This was the first in-flight fatality of any space program.<ref>{{cite web | url=https://www.nasa.gov/topics/history/features/komarov.html | title=NASA – Vladimir Komarov and Soyuz 1 | access-date=February 5, 2023 | archive-date=November 12, 2020 | archive-url=https://web.archive.org/web/20201112042927/https://www.nasa.gov/topics/history/features/komarov.html | url-status=dead }}</ref>

[[File:Portrait of ASTP crews - restoration.jpg|thumb|The American and Soviet crews of the [[Apollo–Soyuz]] mission]]

The Soviets were beaten in sending the first crewed flight around the Moon in 1968 by [[Apollo 8]], but Mishin pressed ahead with development of the flawed super heavy [[N1 (rocket)|N1]], in the hope that the Americans would have a setback, leaving enough time to make the N1 workable and land a man on the Moon first. There was a success with the joint flight of [[Soyuz 4]] and [[Soyuz 5]] in January 1969 that tested the rendezvous, docking, and crew transfer techniques that would be used for the landing, and the [[LK (spacecraft)|LK lander]] was tested successfully in earth orbit. But after four uncrewed test launches of the N1 ended in failure, the program was suspended for two years and then cancelled, removing any chance of the Soviets landing men on the Moon before the United States.<ref name="moon">{{cite web|author=Nicholas L. Johnson |url=https://www.lpi.usra.edu/publications/books/sovietReach/index.pdf |title=The Soviet Reach for The Moon |website=usra.edu | publisher = USRA | date=1995 | archive-url=https://web.archive.org/web/20210216223026/https://www.lpi.usra.edu/publications/books/sovietReach/index.pdf  | archive-date=2021-02-16  | access-date=2022-05-13}}</ref>

Besides the crewed landings, the abandoned Soviet Moon program included the multipurpose moon base [[Zvezda (moonbase)|Zvezda]], first detailed with developed mockups of expedition vehicles<ref>{{cite web |url=http://astronautix.com/craft/lekmplex.htm |title=LEK Lunar Expeditionary Complex|website=Astronautix.com|access-date=2016-01-19|url-status=dead |archive-url=https://web.archive.org/web/20131208200041/http://www.astronautix.com/craft/lekmplex.htm|archive-date=2013-12-08}}</ref> and surface modules.<ref>{{cite web |url=http://astronautix.com/craft/dlbodule.htm|title=DLB Module|website=Astronautix.com|access-date=2016-01-19|url-status=dead |archive-url=https://web.archive.org/web/20140107164731/http://www.astronautix.com/craft/dlbodule.htm |archive-date=2014-01-07}}</ref>

Following this setback, Chelomey convinced Ustinov to approve a program in 1970 to advance his [[Almaz]] military space station as a means of beating the US's announced [[Skylab]]. Mishin remained in control of the project that became [[Salyut]] but the decision backed by Mishin to fly a three-man crew without pressure suits rather than a two-man crew with suits to [[Salyut 1]] in 1971 proved fatal when the re-entry capsule depressurized killing the crew on their return to Earth. Mishin was removed from many projects, with Chelomey regaining control of Salyut. After working with [[NASA]] on the [[Apollo–Soyuz]], the Soviet leadership decided a new management approach was needed, and in 1974 the N1 was canceled and Mishin was out of office. The design bureau was renamed [[NPO Energia]] with Glushko as chief designer.<ref name="moon" />

In contrast with the difficulty faced in its early crewed lunar programs, the USSR found significant success with its remote moon operations, achieving two historical firsts with the automatic [[Lunokhod]] and the Luna [[sample return mission]]s. The [[Mars program|Mars probe program]] was also continued with some success, while the explorations of Venus and then of the Halley comet by the [[Venera]] and [[Vega program|Vega]] probe programs were more effective.<ref name="moon" />

== Lunar missions ==
[[File:Luna 3 moon.jpg|thumb|197x197px|The first photo of the far side of the moon transmitted by Luna 3]]
[[Luna programme|The "Luna" programme]], achieved the first flyby of the moon by [[Luna 1]] in 1959 (also marking the first time a probe reached the far side of the moon),<ref name=":1">{{Cite web |title=Luna 1 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1959-012A |website=nssdc.gsfc.nasa.gov}}</ref> the first impact of the moon by [[Luna 2]],<ref name=":2">{{Cite web |title=Luna 2 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1959-014A |website=nssdc.gsfc.nasa.gov}}</ref> and the first photos of the far side of the moon by [[Luna 3]].

As well as garnering scientific information on the moon, Luna 1 was able to detect a strong flow of [[Solar wind|ionized plasma emanating from the Sun]], streaming through interplanetary space. Luna 2 impacted the moon east of [[Mare Imbrium]].<ref name=":2" /> Photography transmitted by Luna 3 showed two dark regions which were named [[Mare Moscoviense]] (Sea of Moscow) and [[Mare Desiderii]] (Sea of Dreams), the latter was found to be composed of the smaller [[Mare Ingenii]] and other dark craters.<ref>{{Cite web |title=Luna 3 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1959-008A |website=nssdc.gsfc.nasa.gov}}</ref> Luna 2 marked the first time a man-made object has contacted a celestial body. Luna 1 discovered the Moon had no magnetic field.<ref name=":1" />
[[File:First Photo from the Surface of the Moon.jpg|thumb|194x194px|First photo from the surface of the Moon transmitted by Luna 9]]
In 1963, the Soviet Union's "2nd Generation" Luna programme was less successful, [[Luna 4]], [[Luna 5]], [[Luna 6]], [[Luna 7]], and [[Luna 8]] were all met with mission failures. However, in 1966 [[Luna 9]] achieved the first soft-landing on the Moon, and successfully transmitted photography from the surface.<ref>{{Cite web |title=Luna 9 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1966-006A |website=nssdc.gsfc.nasa.gov}}</ref> [[Luna 10]] marked the first man-made object to establish an orbit around the Moon,<ref>{{Cite web |title=Luna 10 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1966-027A |website=nssdc.gsfc.nasa.gov}}</ref> followed by [[Luna 11]], [[Luna 12]], and [[Luna 14]] which also successfully established orbits. [[Luna 12]] was able to transmit detailed photography of the surface from orbit.<ref>{{Cite web |title=Luna 12 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1966-094A |website=nssdc.gsfc.nasa.gov}}</ref> Luna 10, 12, and [[Luna 14]] conducted [[Gamma ray spectrometry]] of the Moon, among other tests.
[[File:Moon landing map.jpg|thumb|186x186px|The near side of the moon, showing Luna probe landing locations with red triangles]]
The [[Zond program]]me was orchestrated alongside the ''Luna'' programme with [[Zond 1]] and [[Zond 2]] launching in 1964, intended as flyby missions, however both failed.<ref>{{Cite web |title=Zond 1 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1964-016D |website=nssdc.gsfc.nasa.gov}}</ref><ref>{{Cite web |title=Zond 2 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1964-078C |website=nssdc.gsfc.nasa.gov}}</ref> [[Zond 3]] however was successful, and transmitted high quality photography from the far side of the moon.<ref>{{Cite web |title=Zond 3 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1965-056A |website=nssdc.gsfc.nasa.gov}}</ref><ref>{{Cite web |title=Zond 3 photography |url=https://nssdc.gsfc.nasa.gov/nmc/experiment/display.action?id=1965-056A-01 |website=nssdc.gsfc.nasa.gov}}</ref> 
[[File:Postage stamp of the USSR - a picture of the Earth from Zond-7.jpg|left|thumb|212x212px|Soviet stamp from 1969 showing Earth from Zond 7]]
[[File:The Soviet Union 1970 CPA 3951 stamp (Luna 16 in Flight (1970.09.12)).jpg|left|thumb|224x224px|A Soviet Union stamp from 1970 showing Luna 16]]
In late 1966, [[Luna 13]] became the third spacecraft to make a soft-landing on the Moon, with the American [[Surveyor 1]] having now taken second.<ref>{{Cite web |title=Luna 13 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1966-116A |website=nssdc.gsfc.nasa.gov}}</ref>

[[Zond 4]], launched in 1968 was intended as a means to test the possibility of a manned mission to the moon, including methods of a stable re-entry to earth from a Lunar trajectory using a heat shield.<ref>{{Cite web |date=2018-03-06 |title=50 Years Ago: Zond 4 launched successfully. - NASA |url=https://www.nasa.gov/history/50-years-ago-zond-4-launched-successfully/ |access-date=2024-11-20 |language=en-US}}</ref> It did not flyby the moon, but established an elliptical orbit at Lunar distance. Due to issues with the crafts orientation, it was unable to make a soft-landing in the Soviet union and instead was self destructed. Later in the year [[Zond 5]], carrying two [[Russian tortoise]]s became the first man-made object to flyby the moon and return to Earth (as well as the first animal to flyby the moon), splashing down in the Indian Ocean.<ref>{{Cite web |title=Zond 5 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1968-076A |website=nssdc.gsfc.nasa.gov}}</ref> [[Zond 6]], [[Zond 7]], and [[Zond 8]] had similar mission profiles, Zond 6  failed to return to earth safely, [[Zond 7]] did however and returned high quality color photography of the earth and the moon from varying distances,<ref>{{Cite web |title=Zond 7 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1969-067A |website=nssdc.gsfc.nasa.gov}}</ref> Zond 8 successfully returned to earth after a Lunar flyby.<ref>{{Cite web |title=Zond 8 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1970-088A |website=nssdc.gsfc.nasa.gov}}</ref> 
[[File:Stromgren Zond 8.jpg|thumb|Lunar crater, taken by Zond 8]]
In 1969, [[Luna 15]] was an intended lunar sample return mission, however resulted in a crash landing.<ref>{{Cite web |title=Luna 15 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1969-058A |website=nssdc.gsfc.nasa.gov}}</ref> In 1970 however [[Luna 16]] became the first robotic probe to land on the Moon and return a surface sample, having drilled 35&nbsp;cm into the surface,<ref>{{Cite web |title=Luna 16 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1970-072A |website=nssdc.gsfc.nasa.gov}}</ref> to Earth and represented the first lunar sample return mission by the Soviet Union and the third overall, having followed the [[Apollo 11]] and [[Apollo 12]] crewed missions.

[[Luna 17]], [[Luna 21]] and [[Luna 24]] delivered rovers onto the surface of the moon.<ref>{{Cite web |title=Luna 17 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1970-095D |website=nssdc.gsfc.nasa.gov}}</ref> [[Luna 20]] was another successful sample return mission.<ref>{{Cite web |title=Luna 20 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1972-007A |website=nssdc.gsfc.nasa.gov}}</ref> [[Luna 18]] and [[Luna 23]] resulted in crash landings.

In total there were 24 missions in the ''Luna'' Programme, 15 were considered to be successful, including 4 hard landings and 3 soft landings, 6 orbits, and 2 flybys. The programme was continued after the collapse of the Soviet union, when the  [[Roscosmos|Russian federation space agency]] launched [[Luna 25]] in 2023.<ref>{{Cite web |date=2021-07-18 |title=50 Years Later, the Soviet Union's Luna Program Might Get a Reboot |url=https://www.popularmechanics.com/space/moon-mars/a36984208/soviet-luna-program-history/ |access-date=2024-11-20 |website=Popular Mechanics |language=en-US}}</ref>

== Venusian missions ==
[[File:Почтовая марка СССР № 5278. 1982. Полёт автоматических межпланетных станций «Венера-13» и «Венера-14».jpg|left|thumb|223x223px|A Soviet stamp from 1982 showing Venera 13 and 14]]
The [[Venera]] programme marked many firsts in space exploration and [[Observations and explorations of Venus|explorations of Venus]]. [[Venera 1]] and [[Venera 2]] resulted in failure due to losses of contact, [[Venera 3]], which also lost contact, marked the first time a man-made object made contact with another planet after it impacted Venus on March 1, 1966. [[Venera 4]], [[Venera 5]], and [[Venera 6]] performed successful atmospheric entry. In 1970 [[Venera#Venera 7|Venera 7]] marked the first time a spacecraft was able to return data after landing on another planet.<ref name=":3">{{Cite web |title=Venera 7 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1970-060A |website=nssdc.gsfc.nasa.gov}}</ref>

Venera 7 held a resistant [[thermometer]] and an aneroid [[barometer]] to measure the temperature and atmospheric pressure on the surface, the transmitted data showed 475 C at the surface, and a pressure of 92 bar. A wind of 2.5 meters/sec was extrapolated from other measurements. The landing point of Venera 7 was {{coord|5|S|9|W}}.<ref>{{Cite web |title=Venera 7, The First Craft to Make Controlled Landing on Another Planet And Send Data From its Surface |url=https://www.amusingplanet.com/2021/12/venera-7-first-craft-to-make-controlled.html |access-date=2024-11-20 |website=www.amusingplanet.com |language=en}}</ref><ref>{{Cite web |title=Venera 7 |url=http://weebau.com/satplan/venera%207.htm |access-date=2024-11-20 |website=weebau.com}}</ref> Venera 7 impacted the surface at a somewhat high speed of 17 metres per second, later analysis of the recorded radio signals revealed that the probe had survived the impact and continued transmitting a weak signal for another 23 minutes. It is believed that the spacecraft may have bounced upon impact and come to rest on its side, so the antenna was not pointed towards Earth.<ref name=":3" /><ref>{{Cite web |title=Plumbing the Atmosphere of Venus |url=http://mentallandscape.com/V_Lavochkin1.htm |access-date=2024-11-20 |website=mentallandscape.com}}</ref>
[[File:Foto de Venera 9.png|thumb|313x313px|Surface of Venus taken by Venera 9]]
In 1972, [[Venera 8]] landed on Venus and measured the light level as being suitable for surface photography, finding it to be similar to the amount of light on Earth on an overcast day with roughly 1&nbsp;km visibility.<ref>{{Cite web |title=Venera 8 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1972-021A |website=nssdc.gsfc.nasa.gov}}</ref>

In 1975, [[Venera 9]] established an orbit around Venus and successfully returned the first photography of the surface of Venus.<ref>{{Cite web |title=Venera 9 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1975-050A |website=nssdc.gsfc.nasa.gov}}</ref><ref>{{Cite web |title=Venera 9 descent craft |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1975-050D |website=nssdc.gsfc.nasa.gov}}</ref> [[Venera 10]] landed on Venus and followed with further photography shortly after.<ref>{{Cite web |title=Venus - Venera 10 Lander |url=https://nssdc.gsfc.nasa.gov/imgcat/html/object_page/v10_lander_proc.html |website=nssdc.gsfc.nasa.gov}}</ref>

In 1978, [[Venera 11]] and [[Venera 12]] successfully landed, however ran into issues performing photography and soil analysis. Venera 11's light sensor detected lightning strikes.<ref>{{Cite web |title=A history of the search for life on Venus |url=https://www.skyatnightmagazine.com/space-missions/history-search-life-venus |access-date=2024-11-20 |website=www.skyatnightmagazine.com |date=September 14, 2020 |language=en}}</ref><ref>{{Cite web |title=The Venera 11 & 12 probes to Venus |url=https://heasarc.gsfc.nasa.gov/docs/heasarc/missions/venera1112.html |access-date=2024-11-20 |website=heasarc.gsfc.nasa.gov}}</ref><ref>{{Cite web |title=Venera 11 descent craft |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1978-084D |website=nssdc.gsfc.nasa.gov}}</ref>
[[File:Surface of Venus taken by Venera 13 (panoramic).jpg|thumb|310x310px|Surface of Venus taken by Venera 13 (panoramic)]] 
In 1981, [[Venera 13]] performed a successful soft-landing on Venus and marked the first probe to drill into the surface of another planet and take a sample.<ref name=":4">{{Cite web |title=Venera 13 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1981-106D |website=nssdc.gsfc.nasa.gov}}</ref><ref>{{Cite web |title=Surface of Venus |url=https://pages.uoregon.edu/jschombe/ast121/lectures/surface_venus.html |access-date=2024-11-19 |website=pages.uoregon.edu}}</ref> Venera 13 also took an audio sample of the Venusian environment, marking another first.<ref>{{Cite web |title=Drilling into the Surface of Venus |url=http://mentallandscape.com/V_Venera11.htm |access-date=2024-11-19 |website=mentallandscape.com}}</ref>

Venera 13 returned the first color images of the surface of Venus, revealing an orange-brown flat bedrock surface covered with loose [[regolith]] and small flat thin angular rocks. The composition of the sample determined by the X-ray fluorescence spectrometer put it in the class of weakly differentiated melanocratic alkaline gabbroids, similar to terrestrial leucitic basalt with a high potassium content. The acoustic detector returned the sounds of the spacecraft operations and the background wind, estimated to be a speed of around 0.5 m/sec wind.<ref name=":4" />

[[Venera 14]], an identical spacecraft to Venera 13, launched 5 days apart. The mission profiles were very similar, except 14 ran into issues using it's spectrometer to analyze the soil.<ref>{{Cite web |title=Venera 14 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1981-110A |website=nssdc.gsfc.nasa.gov}}</ref>

In total 10 Venera probes achieved a soft landing on the surface of Venus.

In 1984, the [[Vega program]]me began and ended with the launch of two crafts launched 6 days apart, [[Vega 1]] and [[Vega 2]]. Both crafts deployed a balloon in addition to a lander, marking a first in spaceflight.<ref>{{Cite web |title=Vega 1 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1984-125A |website=nssdc.gsfc.nasa.gov}}</ref><ref>{{Cite web |title=Vega 2 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1984-128A |website=nssdc.gsfc.nasa.gov}}</ref><ref>{{Cite web |title=In Depth {{!}} Vega 2 |url=https://solarsystem.nasa.gov/missions/vega-2/in-depth/ |access-date=2024-11-20 |website=NASA Solar System Exploration}}</ref>

== Martian missions ==
[[File:Mars3 iki.jpg|thumb|The Mars 3 spacecraft]]
[[File:1972. Марс-3.jpg|thumb|A Soviet stamp from 1972 showing Mars 3]]
The first Soviet mission to [[Exploration of Mars|explore Mars]], [[Mars 1]], was launched in 1962. Although it was intended to fly by the planet and transmit scientific data, the spacecraft lost contact before reaching Mars, marking a setback for the program. In 1971, the Soviet Union launched [[Mars 2]] and [[Mars 3]]. Mars 2 became the first spacecraft to reach the surface of mars, however this was a [[hard landing]] and was destroyed on impact.<ref>{{Cite book |last=Harland |first=David M. |title=The Soviet Space Program: The History of the U.S.S.R.'s Space Achievements |publisher=Springer |year=1999}}</ref><ref>{{Cite web |title=Mars 2 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1971-045A |website=nssdc.gsfc.nasa.gov}}</ref> However, Mars 3 achieved a historic milestone by becoming the first successful soft landing on Mars. Mars 3 used parachutes and rockets as part of its landing system, however contacted the surface at a somewhat high speed of 20 metres per second. Unfortunately, its lander transmitted data for only up to 20 seconds before it went silent.<ref>{{Cite web |title=Mars 3 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1971-049F |website=nssdc.gsfc.nasa.gov}}</ref>

Following the initial successes and setbacks, the [[Mars 4]], [[Mars 5]], [[Mars 6]], and [[Mars 7]] missions were launched between 1969 and 1973. Mars 4 and Mars 5 performed successful flybys, performing analysis which detected the presence of a weak Ozone layer and magnetic field corroborating analysis done by the American [[Mariner 4]] and [[Mariner 9]].<ref>{{Cite web |title=Mars 5 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1973-049A |website=nssdc.gsfc.nasa.gov}}</ref> Mars 6 and Mars 7 failed to successfully land.<ref>{{Cite web |title=Mars 4 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1973-047A |website=nssdc.gsfc.nasa.gov}}</ref>

== Salyut space station ==
[[File:Salyut-4 diagram.gif|thumb|Salyut 4 orbital station]]
The [[Salyut programme]] was a series of missions which established the first earth orbit Space station.<ref name=":0">{{Cite web |date=2021-04-19 |title=50 Years Ago: Launch of Salyut, the World's First Space Station - NASA |url=https://www.nasa.gov/missions/station/50-years-ago-launch-of-salyut-the-worlds-first-space-station/ |access-date=2024-11-19 |language=en-US}}</ref> "Salyut" meaning "Salute" translated.
[[File:Salyut-7kosmos1686mayakT-15.jpg|thumb|Salyut-7 station diagram]]
Initially, the ''Salyut'' stations served as research laboratories in orbit. [[Salyut 1]], the first in the series, launched in 1971, was primarily a civilian scientific mission. The crew set a then record-setting 24-day mission though its tragic end due to the death of the ''Soyuz-11'' crew after a docking accident underscored the high risks of human spaceflight.<ref>{{Cite web |title=Salyut 1 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1971-032A |website=nssdc.gsfc.nasa.gov}}</ref> Following this, the Soviet Union also developed [[Salyut 2]] and [[Salyut 3]], which featured reconnaissance capabilities and carried a [[Salyut 3#On-board gun|large gun]],<ref name=":0" /><ref>{{Cite web |title=Russia's early space stations (1969-1985) |url=https://russianspaceweb.com/spacecraft_manned_salyut.html |access-date=2024-11-19 |website=russianspaceweb.com}}</ref> both ran into significant issues during their missions.<ref>{{Cite web |title=Salyut 2 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1973-017A |website=nssdc.gsfc.nasa.gov}}</ref><ref>{{Cite web |title=Salyut-3 (OPS-2) space station |url=https://www.russianspaceweb.com/almaz_ops2.html |access-date=2024-11-19 |website=www.russianspaceweb.com}}</ref> This dual use design of both scientific and military research applications demonstrated the Soviet Union's strategy of blending scientific achievement with defense applications.
[[File:The Soviet Union 1978 CPA 4881 stamp (Soviet-East German Space Flight. Space photograph of Pamir Mountains, Salyut 6, Soyuz 29 and 31 complex and spectrum).jpg|left|thumb|205x205px|A Soviet stamp from 1978 with the [[East Germany|East German]] flag showing Salyut]]
[[File:Model of Salyut-7 with two Soyuz spacecrafts.JPEG|thumb|Model of Salyut-7 with a Soyuz spacecraft docked]]
As the ''Salyut'' program progressed, later missions like [[Salyut 6]] and [[Salyut 7]] improved upon earlier designs by allowing long-duration crewed missions and more complex experiments. These stations, with their expanded crew capacity and amenities for long term stay, carrying electric stoves, a refrigerator, and constant hot water.<ref>{{Cite web |title=Salyut 7 |url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1982-033A |website=nssdc.gsfc.nasa.gov}}</ref> The ''Salyut'' series effectively paved the way for future Soviet and later Russian space stations, including the [[Mir]] space station, which would become a significant part in the history of long-term space exploration.

The longest stay, aboard Salyut 7, was 237 days.<ref>{{Cite web |date=2023-08-15 |title=The First Space Stations |url=https://airandspace.si.edu/stories/editorial/first-space-stations |access-date=2024-11-20 |website=airandspace.si.edu |language=en}}</ref>

==Program secrecy==
[[File:The Soviet Union 1964 CPA 3089A souvenir sheet (Soviet Conquest of Space. 1st satellite, 1st pennant on the Moon, 1st view of the Moon far side, 1st man in space, 1st group in space, 1st woman in space) large resolution.jpg|thumb|350px|''Communists pave the way to the stars''. The Soviet [[miniature sheet]] of 1964 displaying six historical firsts of the Soviet space program.]]

The Soviet space program had withheld information on its projects predating the success of [[Sputnik]], the world's first artificial satellite. In fact, when the Sputnik project was first approved, one of the most immediate courses of action the [[Politburo]] took was to consider what to announce to the world regarding their event.<ref>{{Cite web|url=https://prezi.com/vibdzluxed9y/the-soviet-space-program |title=The Soviet Space Program by Eric Mariscal |publisher=Prezi.com |access-date=2022-03-08}}</ref>

The [[Telegraph Agency of the Soviet Union]] (TASS) established precedents for all official announcements on the Soviet space program.<ref>{{Cite web | url=https://tass.com/history | title=TASS history }}</ref> The information eventually released did not offer details on who built and launched the satellite or why it was launched. The public release revealed, "there is an abundance of arcane scientific and technical data... as if to overwhelm the reader with mathematics in the absence of even a picture of the object".<ref name="University of Pittsburgh Press, Siddiqi & Andrews, 2011" /> What remains of the release is the pride for Soviet [[cosmonautics]] and the vague hinting of future possibilities then available after [[Sputnik]]'s success.<ref>{{cite web|url=https://www.khanacademy.org/humanities/us-history/postwarera/1950s-america/a/the-start-of-the-space-race |title=The start of the Space Race (article) |publisher=Khan Academy |date=1958-10-01 |access-date=2022-03-08}}</ref>

The Soviet space program's use of secrecy served as both a tool to prevent the leaking of classified information between countries and also to create a mysterious barrier between the space program and the Soviet populace. The program's nature embodied ambiguous messages concerning its goals, successes, and values. Launchings were not announced until they took place. [[Cosmonaut]] names were not released until they flew. Mission details were sparse. Outside observers did not know the size or shape of their rockets or cabins or most of their spaceships, except for the first Sputniks, lunar probes and Venus probe.<ref name="ebooks.ohiolink.edu">{{Cite web|url=http://ebooks.ohiolink.edu/xtf-ebc/view?docId=tei/sv2/9781461430520/9781461430520.xml&query=&brand=default|title=OhioLINK Institution Selection |website=Ebooks.ohiolink.edu|access-date=2016-01-19}}</ref>

[[File:mirdream sts76.jpg|thumb|250px|left|''[[Mir]]'' in 1996 as seen from {{OV|104}} during [[STS-76]]]]

However, the military influence over the Soviet space program may be the best explanation for this secrecy. The [[OKB-1]] was subordinated under the [[Ministry of General Machine-Building]],<ref name="University of Pittsburgh Press, Siddiqi & Andrews, 2011" /> tasked with the development of intercontinental ballistic missiles, and continued to give its assets random identifiers into the 1960s: "For example, the [[Vostok (spacecraft)|Vostok]] spacecraft was referred to as 'object IIF63' while its launch rocket was 'object 8K72K'".<ref name="University of Pittsburgh Press, Siddiqi & Andrews, 2011" /> Soviet defense factories had been assigned numbers rather than names since 1927. Even these internal codes were obfuscated: in public, employees used a separate code, a set of special post-office numbers, to refer to the factories, institutes, and departments.

The program's public pronouncements were uniformly positive: as far as the people knew, the Soviet space program had never experienced failure. According to historian James Andrews, "With almost no exceptions, coverage of Soviet space exploits, especially in the case of human space missions, omitted reports of failure or trouble".<ref name="University of Pittsburgh Press, Siddiqi & Andrews, 2011" />

According to Dominic Phelan in the book ''Cold War Space Sleuths'', "The [[USSR]] was famously described by [[Winston Churchill]] as 'a riddle, wrapped in a mystery, inside an enigma' and nothing signified this more than the search for the truth behind its space program during the Cold War. Although the [[Space Race]] was literally played out above our heads, it was often obscured by a figurative 'space curtain' that took much effort to see through."<ref name="ebooks.ohiolink.edu"/><ref>{{Cite web|author=Dominic Phelan |url=https://link.springer.com/content/pdf/bfm%3A978-1-4614-3052-0%2F1.pdf |title=Cold War Space Sleuths |website=springer.com | publisher = Praxis Publishing | date=2013 | archive-url=https://web.archive.org/web/20220513182442/https://link.springer.com/content/pdf/bfm:978-1-4614-3052-0/1.pdf?error=cookies_not_supported&code=415934f9-1e4a-4c5a-9cc3-8396837c047e  | archive-date=2022-05-13  | access-date=2022-05-13}}</ref>

==Projects and accomplishments==
[[File:Gagarin Capsule.jpg|thumb|right|The [[Vostok 1]] capsule which carried Yuri Gagarin on the first crewed space flight, now on display at the [[RKK Energiya museum]] outside of Moscow]]

===Completed projects===
The Soviet space program's projects include:
{{div col|colwidth=30em}}
* [[Almaz]] space stations
* [[Cosmos (satellite)|Cosmos]] satellites
* [[Foton (space programs)|Foton]]
* [[Luna program|Luna]] – Moon flybys, orbiters, impacts, landers, rovers, sample returns
* [[Mars probe program]]
* [[Meteor (satellite)|Meteor meteorological satellites]]
* [[Molniya (satellite)|Molniya]] communications satellites
* [[Mir]] space station
* [[Proton satellite]]s
* [[Phobos program|Phobos]] Mars probes program
* [[Salyut]] space stations
* [[Soyuz program]] spacecraft
* [[Sputnik program|Sputnik]] satellites
* [[TKS spacecraft]]
* [[Venera]] – Venus probes program
* [[Vega program]] – Venus and comet Halley probes program
* [[Vostok program]] spacecraft
* [[Voskhod program]] spacecraft
* [[Zond program]]
{{div col end}}

===Notable firsts===
[[File:Luna 3 moon.jpg|right|thumb|The first image of the far side of the Moon returned by ''[[Luna 3]]''.]]
[[File:FP2A3620 (23497688248) (cropped).jpg|thumb|[[Mars 3]], the first spacecraft to land on [[Mars]]. Lander model at the [[Memorial Museum of Cosmonautics]] in Moscow.]]

Two days after the United States announced its intention to launch an [[artificial satellite]], on July 31, 1955, the Soviet Union announced its intention to do the same. [[Sputnik 1]] was launched on October 4, 1957, beating the United States and stunning people all over the world.<ref name="High Frontier">{{cite book|last=Launius|first=Roger|title=To Reach the High Frontier|date=2002|publisher=[[University Press of Kentucky]]|isbn=0-8131-2245-7|pages=7–10}}</ref>

The Soviet space program pioneered many aspects of space exploration:
* 1957: First intercontinental ballistic missile and orbital launch vehicle, the [[R-7 Semyorka]].
* 1957: First satellite, [[Sputnik 1]].
* 1957: First animal in Earth orbit, the dog [[Laika]] on [[Sputnik 2]].
* 1959: First rocket ignition in Earth orbit, first man-made object to escape Earth's gravity, [[Luna 1]].
* 1959: First data communications, or [[telemetry]], to and from [[outer space]], [[Luna 1]].
* 1959: First man-made object to pass near the [[Moon]], first man-made object in Heliocentric orbit, [[Luna 1]].
* 1959: First probe to impact the Moon, [[Luna 2]].
* 1959: First images of the Moon's [[far side (Moon)|far side]], [[Luna 3]].
* 1960: First animals to safely return from Earth orbit, the dogs [[Belka and Strelka]] on [[Korabl-Sputnik 2|Sputnik 5]].
* 1961: First probe launched to Venus, [[Venera 1]].
* 1961: First person in space (International definition) and in Earth orbit, [[Yuri Gagarin]] on [[Vostok 1]], [[Vostok programme|Vostok program]].
* 1961: First person to spend over 24 hours in space [[Gherman Titov]], [[Vostok 2]] (also first person to sleep in space).
* 1962: First dual crewed spaceflight, [[Vostok 3]] and [[Vostok 4]].
* 1962: First probe launched to Mars, [[Mars 1]].
* 1963: First woman in space, [[Valentina Tereshkova]], [[Vostok 6]].
* 1964: First multi-person crew (3), [[Voskhod 1]].
* 1965: First extra-vehicular activity ([[extra-vehicular activity|EVA]]), by [[Alexsei Leonov]],<ref name=First-Spacewalk>{{cite web|url=https://www.bbc.co.uk/news/special/2014/newsspec_9035/index.html |title=The First Spacewalk How the first human to take steps in outer space nearly didn't return to Earth|last1=Rincon|first1=Paul|last2=Lachmann|first2=Michael|date=October 13, 2014|website=BBC News |archive-url=https://web.archive.org/web/20141014061848/http://www.bbc.co.uk/news/special/2014/newsspec_9035/index.html|archive-date=2014-10-14|access-date=2014-10-19}}</ref> [[Voskhod 2]].
* 1965: First radio telescope in space, [[Zond 3]].
* 1965: First probe to hit another planet of the [[Solar System]] ([[Venus]]), [[Venera 3]].
* 1966: First probe to make a soft landing on and transmit from the surface of the Moon, [[Luna 9]].
* 1966: First probe in lunar orbit, [[Luna 10]].
* 1966: [[first images of Earth from space|First image of the whole Earth disk]], [[Molniya 1]].<ref>{{cite news |url=https://www.washingtonpost.com/blogs/achenblog/post/spaceship-earth-the-first-photos/2012/01/03/gIQAzXF5XP_blog.html|title=Spaceship Earth: The first photos|author=Joel Achenbach|newspaper=[[The Washington Post]]|date=3 January 2012|access-date=16 June 2020}}</ref>
* 1967: First uncrewed rendezvous and docking, [[Cosmos 186]]/[[Cosmos 188]].
* 1968: First living beings to reach the Moon (circumlunar flights) and return unharmed to Earth, [[Russian tortoise]]s and other lifeforms on [[Zond 5]].
* 1969: First docking between two crewed craft in Earth orbit and exchange of crews, [[Soyuz 4]] and [[Soyuz 5]].
* 1970: First soil samples automatically extracted and returned to Earth from another celestial body, [[Luna 16]].
* 1970: First robotic space rover, [[Lunokhod 1]] on the Moon.
* 1970: First full [[interplanetary travel]] with a soft landing and useful data transmission. Data received from the surface of another planet of the Solar System ([[Venus]]), [[Venera 7]]
* 1971: First space station, [[Salyut 1]].
* 1971: First probe to impact the surface of Mars, [[Mars 2]].
* 1971: First probe to land on Mars, [[Mars 3]].
* 1971: First armed space station, [[Almaz]].
* 1975: First probe to orbit Venus, to make a soft landing on Venus, first photos from the surface of Venus, [[Venera 9]].
* 1980: First Asian person in space, Vietnamese Cosmonaut [[Pham Tuan]] on [[Soyuz 37]]; and First [[Latin American]], [[Cuba]]n and person with African ancestry in space, [[Arnaldo Tamayo Méndez]] on [[Soyuz 38]]
* 1984: First [[India]]n Astronaut in space, [[Rakesh Sharma]] on [[Soyuz T-11]] ([[Salyut 7|Salyut-7]] space station).
* 1984: First woman to [[Extra-vehicular activity|walk in space]], [[Svetlana Savitskaya]] ([[Salyut 7]] space station).
* 1986: First crew to visit two separate space stations ([[Mir]] and [[Salyut 7]]).
* 1986: First probes to deploy robotic balloons into Venus atmosphere and to return pictures of a comet during close flyby [[Vega 1]], [[Vega 2]].
* 1986: First permanently crewed space station, [[Mir]], 1986–2001, with a permanent presence on board (1989–1999).
* 1987: First crew to spend over one year in space, [[Vladimir Titov (cosmonaut)|Vladimir Titov]] and [[Musa Manarov]] on board of [[Soyuz TM-4]] – [[Mir]].
* 1988: First fully automated flight of a spaceplane (''[[Buran (spacecraft)|Buran]]'').

==Incidents, failures, and setbacks==
===Accidents and cover-ups===
{{Main|List of spaceflight-related accidents and incidents}}

The Soviet space program experienced a number of fatal incidents and failures.<ref>{{cite book|title=Red Star in Orbit |author=James E Oberg|author-link=James Oberg|date=1981|isbn=978-0394514291|url-access=registration |publisher = Random House|url= https://archive.org/details/redstarinorbit00jame}}</ref>

The first official cosmonaut fatality during training occurred on March 23, 1961, when [[Valentin Bondarenko]] died in a fire within a low pressure, high oxygen atmosphere.

On April 23, 1967, [[Soyuz 1]] crashed into the ground at {{cvt|90|mph|km/h}} due to a parachute failure, killing [[Vladimir Komarov]]. Komarov's death was the first [[List of spaceflight-related accidents and incidents|in-flight fatality]] in the [[history of spaceflight]].<ref>[https://sma.nasa.gov/SignificantIncidents/assets/tragic-tangle.pdf Tragic Tangle], ''System Failure Case Studies'', NASA</ref><ref>[https://www.nasa.gov/topics/history/features/komarov.html Vladimir Komarov and Soyuz 1] {{Webarchive|url=https://web.archive.org/web/20201112042927/https://www.nasa.gov/topics/history/features/komarov.html |date=November 12, 2020 }}, NASA</ref>

The Soviets continued striving for the first lunar mission with the [[N-1 rocket]], which exploded on each of four uncrewed tests shortly after launch. The [[United States|Americans]] won the race to land men on the Moon with [[Apollo 11]] on July 20, 1969.

In 1971, the [[Soyuz 11]] mission to stay at the [[Salyut 1]] space station resulted in the deaths of three cosmonauts when the reentry capsule depressurized during preparations for reentry. This accident resulted in the only human casualties to occur in space (beyond {{cvt|100|km}}, as opposed to the high atmosphere). The crew members aboard Soyuz 11 were [[Vladislav Volkov]], [[Georgy Dobrovolsky]], and [[Viktor Patsayev]].

On April 5, 1975, [[Soyuz 7K-T No.39]], the second stage of a Soyuz rocket carrying two cosmonauts to the [[Salyut 4]] space station malfunctioned, resulting in the first crewed launch abort. The cosmonauts were carried several thousand miles downrange and became worried that they would land in China, [[Sino-Soviet split|which the Soviet Union was having difficult relations with at the time]]. The capsule hit a mountain, sliding down a slope and almost slid off a cliff; however, the parachute lines snagged on trees and kept this from happening. As it was, the two suffered severe injuries and the commander, Lazarev, never flew again.

On March 18, 1980, a [[Vostok rocket]] [[1980 Plesetsk launch pad disaster|exploded on its launch pad]] during a fueling operation, killing 48 people.<ref>{{cite news|url=http://news.bbc.co.uk/2/hi/world/monitoring/media_reports/705808.stm |title=Media Reports &#124; Soviet rocket blast left 48 dead|publisher=BBC News|access-date=2016-01-19}}</ref>

In August 1981, [[Kosmos 434]], which had been launched in 1971, was about to re-enter. To allay fears that the spacecraft carried nuclear materials, a spokesperson from the [[Ministry of Foreign Affairs (Soviet Union)|Ministry of Foreign Affairs of the USSR]] assured the Australian government on 26 August 1981, that the satellite was "an experimental lunar cabin". This was one of the first admissions by the Soviet Union that it had ever engaged in a crewed lunar spaceflight program.<ref name=siddiqi2000>{{Cite book|last1=Siddiqi|first1=Asif Azam |title=Challenge To Apollo: The Soviet Union and the Space Race, 1945–1974|isbn=9780160613050|date=2000|publisher=[[NASA|National Aeronautics and Space Administration]], NASA History Div.|location=[[Washington, D.C.]]|url=https://history.nasa.gov/SP-4408pt1.pdf|access-date=22 May 2022|archive-url=https://web.archive.org/web/20061008193942/https://history.nasa.gov/printFriendly/series95.html|archive-date=2006-10-08|url-status=live}}</ref>{{rp|736}}

In September 1983, a Soyuz rocket being launched to carry cosmonauts to the [[Salyut 7]] space station exploded on the pad, causing the Soyuz capsule's abort system to engage, saving the two cosmonauts on board.<ref>{{cite news
| last         = Schmemann
| first        = Serge
| date         = October 12, 1983
| title        = Soyuz Accident Quietly Conceded 
| url          = https://www.nytimes.com/1983/10/12/world/soyuz-accident-quietly-conceded.html
| work         = New York Times
| location     = United States
| access-date  = 2022-04-20
}}</ref>

===Buran===
[[Image:Buran on An-225 (Le Bourget 1989) (cropped).JPEG|thumb|right|[[Buran programme|Buran]] at airshow (1989).]]
The Soviet [[Buran program]] attempted to produce a class of spaceplanes launched from the [[Energia (rocket)|Energia]] rocket, in response to the US [[Space Shuttle]]. It was intended to operate in support of large space-based military platforms as a response to the [[Strategic Defense Initiative]]. Buran only had orbital maneuvering engines, unlike the Space Shuttle, Buran did not fire engines during launch, instead relying entirely on Energia to lift it out of the atmosphere. It copied the airframe and [[thermal protection system]] design of the US [[Space Shuttle Orbiter]], with a maximum payload of 30 metric tons (slightly higher than that of the Space Shuttle), and weighed less.<ref>{{cite web|title=Buran Space Shuttle vs STS – Comparison|url=https://www.buran.su/buranvssts-comparison.php#:~:text=But%20Buran%20is%20a%20little,off%20whereas%20Buran%20has%20no.&text=So%20the%20engines%20are%20on,nearly%20the%20same%20of%20STS.|access-date=2021-02-22|website=www.buran.su}}</ref> It also had the capability to land autonomously. Due to this, some retroactively consider it to be the more capable launch vehicle.<ref>{{cite web|last=Zak|first=Anatoly|date=2013-11-19|title=Did the USSR Build a Better Space Shuttle?|url=https://www.popularmechanics.com/science/space/rockets/did-the-soviets-actually-build-a-better-space-shuttle-16176311|access-date=2021-02-22|website=Popular Mechanics|language=en-US}}</ref> By the time the system was ready to fly in orbit in 1988, strategic arms reduction treaties made Buran redundant. On November 15, 1988, Buran and its Energia rocket were launched from [[Baikonur Cosmodrome]] in [[Kazakhstan]], and after two orbits in three hours, glided to a landing a few miles from its launch pad.<ref>{{cite news|last=Zak|first=Anatoly|date=November 20, 2008|title=Buran – the Soviet space shuttle|publisher=BBC|url=http://news.bbc.co.uk/2/hi/sci/tech/7738489.stm}}</ref> While the craft survived that re-entry, the heat shield was not reusable. This failure resulted from United States counter intelligence efforts.<ref>{{cite web| first=Robert|last=Windrem | date=February 11, 2008|url=https://www.nbcnews.com/id/wbna18686550|title=How the Soviet space shuttle fizzled|access-date=2023-01-04|website=[[NBC News]]}}</ref> After this test flight, the Soviet Ministry of Defense would defund the program, considering it relatively pointless compared to its price.<ref>{{cite web| title=Buran reusable shuttle|url=http://www.russianspaceweb.com/buran.html|access-date=2021-02-22|website=www.russianspaceweb.com}}</ref>

===Polyus satellite===
The [[Polyus (spacecraft)|Polyus satellite]] was a prototype [[space weapon|orbital weapons platform]] designed to destroy [[Strategic Defense Initiative]] satellites with a megawatt [[Carbon dioxide laser|carbon-dioxide laser]].<ref name=starwars>{{cite web| url = http://www.buran.ru/htm/str163.htm| title = Звёздные войны, которых не было |trans-title=Star Wars that didn't happen| author = Konstantin Lantratov}}</ref> Launched mounted upside-down on its [[Energia (rocket)|Energia rocket]], its single flight test was a failure when the [[inertial guidance system]] failed to rotate it 180° and instead rotated a complete 360°.<ref name=grondine>{{cite web |url = http://www.astronautix.com/craft/polyus.htm |title = Polyus |author = Ed Grondine |access-date = 2009-09-15 |url-status = dead |archive-url = https://web.archive.org/web/20100102201428/http://astronautix.com/craft/polyus.htm |archive-date = 2010-01-02 }}</ref>

==Canceled projects==

===Energia rocket===
[[File:RP1357 p169 Polyus satellite on Energia launch vehicle.svg|thumb|upright|x350px|NASA artwork of [[Polyus (spacecraft)|Polyus]] with the [[Energia (rocket)|Energia]] rocket]]
The [[Energia (rocket)|Energia]] was a successfully developed [[super heavy-lift launch vehicle]] which burned [[Hydrogen rocket fuel|liquid hydrogen fuel]]. But without the Buran or Polyus payloads to launch, it was also canceled due to lack of funding on dissolution of the USSR.

===Interplanetary projects===

====Mars missions====
* Heavy rover [[Mars 4NM]] was going to be launched by the abandoned [[N1 (rocket)|N1]] launcher between 1974 and 1975.
* Mars [[sample return mission]] [[Mars 5NM]] was going to be launched by a single N1 launcher in 1975.
* Mars sample return mission [[Mars 5M]] or (Mars-79) was to be double launched in parts by Proton launchers, and then joined in orbit for flight to Mars in 1979.{{Citation needed|date=January 2023}}

====Vesta====
The [[Vesta mission]] would have consisted of two identical double-purposed interplanetary probes to be launched in 1991. It was intended to fly-by Mars (instead of an early plan to Venus) and then study four asteroids belonging to different classes. At [[4 Vesta]] a penetrator would be released.

====Tsiolkovsky====
The Tsiolkovsky mission was planned as a double-purposed deep interplanetary probe to be launched in the 1990s to make a "sling shot" flyby of [[Jupiter]] and then pass within five or seven radii of the [[Sun]]. A derivative of this spacecraft would possibly be launched toward [[Saturn]] and beyond.<ref>{{cite journal|last1=Zak|first1=Anatoly|title=Planetary spacecraft|journal=Russian Space Web |date=February 5, 2013|url=http://www.russianspaceweb.com/spacecraft_planetary_plans.html|access-date=May 13, 2016}}</ref>

==See also==
{{portal|Spaceflight|Soviet Union}}
* [[DRAKON]], an algorithmic visual programming language developed for the Buran space project.
* [[Intercosmos]], a Soviet space program designed to give nations on friendly relations with the Soviet Union access to crewed and uncrewed space missions
* [[List of Russian aerospace engineers]]
* [[List of Russian explorers]]
* [[List of space disasters]]
* [[Pilot-Cosmonaut of the USSR]], an honorary title
* [[Roscosmos]], the program's eventual post-Soviet continuation under the [[Russian Federation]]
* [[Roscosmos Cosmonaut Corps]], Russian astronaut corps
* [[Sheldon names]], which were used to identify launch vehicles of the Soviet Union when their Soviet names were unknown in the USA
* [[Soviet rocketry]]
* [[Space Race]]
* ''[[Tank on the Moon]]'', a 2007 French documentary film on the Lunokhod program

==References==
{{reflist}}

==Bibliography==
* Andrews, James T.: ''Red Cosmos: K. E. Tsiolkovskii, Grandfather of Soviet Rocketry''. (College Station: Texas A&M University Press, 2009)
* Brzezinski, Matthew: ''Red Moon Rising: Sputnik and the Hidden Rivalries that Ignited the Space Age''. (Holt Paperbacks, 2008)
* Burgess, Colin; French, Francis: ''[[Into That Silent Sea|Into That Silent Sea: Trailblazers of the Space Era]]'', 1961–1965. (University of Nebraska Press, 2007)
* Burgess, Colin; French, Francis: ''[[In the Shadow of the Moon (book)|In the Shadow of the Moon: A Challenging Journey to Tranquility]]'', 1965–1969. (University of Nebraska Press, 2007)
* Harford, James: ''Korolev: How One Man Masterminded the Soviet Drive to Beat America to the Moon''. (John Wiley & Sons, 1997)
* [[Asif Azam Siddiqi|Siddiqi, Asif A.]]: ''Challenge to Apollo: The Soviet Union and the Space Race, 1945–1974''. (Washington, D.C.: National Aeronautics and Space Administration, 2000)
* Siddiqi, Asif A.: ''The Red Rockets' Glare: Spaceflight and the Soviet Imagination, 1857–1957''. (New York: Cambridge University Press, 2010)
* Siddiqi, Asif A.; Andrews, James T. (eds.): ''Into the Cosmos: Space Exploration and Soviet Culture''. (Pittsburgh: University of Pittsburgh Press, 2011)
* {{cite book |last1=Baker |first1=David |last2=Zak |first2=Anatoly |title=Race for Space 1: Dawn of the Space Age |year= 2013 |publisher=RHK |url=https://books.apple.com/au/book/race-for-space-1-dawn-of-the-space-age/id634833085 |access-date=20 May 2022}}
* {{cite book |last1=Chertok |first1=Boris |title=Rockets and People |date=31 January 2005 |publisher=[[NASA|National Aeronautics and Space Administration]] |edition=Volumes 1–4 |url=https://www.nasa.gov/connect/ebooks/rockets_people_vol1_detail.html |access-date=29 May 2022}}
* {{cite book |last1=Rödel |first1=Eberhard |title=The Soviet space program: first steps: 1941–1953 |date=2018 |publisher=Schiffer Publishing Ltd |location=Atglen, PA |isbn=978-0764355394}}
* {{cite book |last1=Reichl |first1=Eugen |title=The Soviet Space Program: The Lunar Mission Years: 1959–1976 |date=2019 |publisher=Schiffer Military History |isbn=978-0-7643-5675-9 |edition=1st |language=English}}
* {{cite book |last1=Reichl |first1=Eugen |title=The Soviet space program: the N1, the Soviet Moon rocket |date=2019 |publisher=Schiffer Publishing |location=Atglen, PA |isbn=978-0764358555}}
* {{cite book |last1=Burgess |first1=Colin |last2=Hall |first2=Rex |title=The First Soviet Cosmonaut Team: Their Lives, Legacy, and Historical Impact |date=2009 |publisher=Praxis |isbn=978-0-387-84824-2 |language=en }}

==External links==
{{div col}}
* [https://web.archive.org/web/20060705030049/http://www.russianspaceweb.com/index.html Russian Space Web]
* [http://www.mentallandscape.com/V_Venus.htm Soviet Exploration of Venus]
* [http://www.mentallandscape.com/S_Sputnik.htm Sputnik: 50 Years Ago]
* [https://web.archive.org/web/20120923131120/http://www.zarya.info/index.htm Zarya – Soviet, Russian and International Space Flight]
* [https://web.archive.org/web/20151129224805/http://www.cosmos-club.org/journals/1998/harford.html Korolev, Mastermind of the Soviet Space Program]
* [https://fas.org/spp/eprint/lindroos_moon1.htm Soviet crewed lunar program]
* [https://kosmo-museum.ru/?locale=en The Cosmonautics Memorial Museum in Moscow]
{{div col end}}

{{Russian space program}}
{{Russian human spaceflight programs}}
{{USSR space probes}}
{{Russian launch vehicles}}
{{Jupiter spacecraft}}
{{Soviet Union topics}}
{{Politics of outer space}}

{{DEFAULTSORT:Soviet Space Program}}
[[Category:Space program of the Soviet Union| ]]
[[Category:Science and technology in the Soviet Union]]
[[Category:Space programs by country|Soviet]]