Medusa Nebula
Template:Short description Script error: No such module "about". Template:Use dmy dates Template:Planetary nebula Template:Sky The Medusa Nebula is a planetary nebula in the constellation of Gemini. It is also known as Abell 21 and Sharpless 2-274. It was originally discovered in 1955 by University of California, Los Angeles astronomer George O. Abell, who classified it as an old planetary nebula.[1] With the computation of expansion velocities and the thermal character of the radio emission, Soviet astronomers in 1971 concluded that it was most likely a planetary nebula.[1] As the nebula is so large, its surface brightness is very low, with surface magnitudes of between +15.99 and +25 reported.Script error: No such module "Unsubst".
The central star of the planetary nebula is an PG 1159 star.[2]
See also
- Abell Catalog of Planetary Nebulae
- Geminga, Gemini gamma-ray source
- Gemini in Chinese astronomy
- IC 444, reflection nebula
- Messier 35 open cluster
- Cancer Minor (constellation) - Obsolete constellation inside modern Gemini
References
External links
- The Sharpless Catalog: Sharpless 274
- APOD picture: The Medusa Nebula
- Images of the Universe: Template:Usurped
Template:Sh2 objects Template:Stars of Gemini Template:Portal bar