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'''Hoag's object''' is a highly unusual [[ring galaxy]] which appears to have a yellow core and a disconnected outer ring. Even more remarkably, another almost identical smaller object can be seen through the ring.
'''Hoag's object''' is a rare [[ring galaxy]].
 
'''Hoag's Object'''
[[Image:Hoagsobject.jpg]]
''Image from the [[Hubble Space Telescope|HST]] and courtesy of [[NASA]]''
 
A ring of blue stars circle the yellow nucleus of this galaxy. The galaxy is about 120,000 light-years wide, which is slightly larger the [[Milky Way Galaxy]]. The gap separating the two stellar populations may contain some [[star cluster]]s that are almost too faint to see. Another ring galaxy can be seen, through Hoag's object, at the 1:00 position.  


References:  Hoag, A. A. (1950), ''AJ'', '''55''', 170  
References:  Hoag, A. A. (1950), ''AJ'', '''55''', 170  

Revision as of 09:37, 20 November 2002

Hoag's object is a rare ring galaxy.

Hoag's Object File:Hoagsobject.jpg Image from the HST and courtesy of NASA

A ring of blue stars circle the yellow nucleus of this galaxy. The galaxy is about 120,000 light-years wide, which is slightly larger the Milky Way Galaxy. The gap separating the two stellar populations may contain some star clusters that are almost too faint to see. Another ring galaxy can be seen, through Hoag's object, at the 1:00 position.

References: Hoag, A. A. (1950), AJ, 55, 170

See also: polar-ring galaxy, NGC 4650A, Cartwheel Galaxy