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{{Short description|Chasma on Mars}}
{{Infobox feature on celestial object
|name = Hebes Chasma
|image = [[Image:Hebes Chasma based on day THEMIS.png|250px]]
|caption = Hebes Chasma based on [[Thermal Emission Imaging System|THEMIS]] day-time image
|coordinates = {{coord|1.1|S|76.2|W|globe:mars_type:landmark|display=inline,title}}
|length = 319 km
|width = 130 km
|depth = 6 km
}}
[[Image:Hebes & Echus chasmata.jpg|230px|thumb|View of most of Hebes Chasma (upper center and right) in mosaic of [[Thermal Emission Imaging System|THEMIS]] infrared images. Parts of [[Ophir Chasma|Ophir]] and [[Echus Chasma|Echus]] chasmata are visible at lower right and upper left, respectively. Just left of center, a side canyon can be seen following a [[graben]] towards the left. [[Perrotin Crater]] is just left of lower center.]]
[[File:Hebes_Chasma_(10186743014).jpg|thumb|Hebes Chasma by Mars Express]]
'''Hebes Chasma''' is an isolated [[chasma]] just north of the [[Valles Marineris]] canyon system of [[Mars]]. It is centered at 1 degree southern latitude and 76 degrees western longitude, just between the Martian equator and the Valles Marineris system, just east of the [[Tharsis]] region.

==Geography==
Hebes Chasma is a completely closed depression in the surface of Mars, with no outflows to the nearby [[Echus Chasma]] to the west, Perrotin Crater to the southwest, or [[Valles Marineris]] to the south. Its maximum extents are approximately 320 km east to west, 130 km north to south, and 5 to 6 km in depth. At the center of the depression is [[Hebes Mensa]], a large [[mesa]] rising some 5 km off the valley floor, nearly as high as the surrounding terrain. This central plateau makes Hebes Chasma a unique valley in Martian geography.

==History of name==
The word Hebes comes from [[Hebe (mythology)|Hebe]], the goddess of youth, who was the daughter of Zeus and Hera. Hebe was the wife of [[Hercules]].<ref>Blunck, J. 1982. Mars and its Satellites. Exposition Press. Smithtown, N.Y.</ref>

== Origin of mesa ==
The walls of Hebes Chasma weather differently than the slopes on the mesa on its floor. Also, studies of the thermal inertia suggest that the mesa and the walls of the canyon are made of different substances. Thermal inertia is how long the surface holds heat. For example, rocky areas will stay warmer than dust at night. One popular idea that explains the difference between the depression's walls and the mesa slopes is that the mesa was formed from material that accumulated in a lake.<ref>{{Cite web|url=http://themis.asu.edu/features/hebes|title=History's Layers in Hebes Chasma | Mars Odyssey Mission THEMIS}}</ref>

<gallery>
Image:Hebes Chasma.JPG|Hebes Chasma, as seen by THEMIS. Reddish areas are rockier.
</gallery>

==See also==
*[[Geography of Mars]]

==References==
<references />
{{commonscat|Hebes Chasma}}

==External links==
*[http://www.esa.int/esaSC/SEM565R03EF_index_0.html A trough in the grand canyon of Mars] – European Space Agencies 3-dimensional images of Hebes Chasma
* [http://spaceinvideos.esa.int/Videos/2013/06/Fly-through_movie_of_Hebes_Chasma Fly-through movie of Hebes Chasma] – video from ''[[Mars Express]]'' data, also available in [http://www.esa.int/Our_Activities/Space_Science/Mars_Express/HRSC_Mars_Videos Windows Media Player version]
*[http://www.google.com/mars/#lat=-1&lon=-76&zoom=8 Hebes Chasma on Google Mars] – scrollable map centered on Hebes Chasma
*[http://themis.asu.edu/features/hebes History's Layers in Hebes Chasma] – THEMIS feature page on Hebes Chasma
*[https://web.archive.org/web/20071024153143/http://home-1.worldonline.nl/~veenen/terragen/mars/mars50.html Terragen render of Hebes Chasma]

{{Geography of Mars}}
{{Portal bar|Solar System}}

[[Category:Valleys and canyons on Mars]]
[[Category:Coprates quadrangle]]

Hebes Chasma - Revision history

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