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ring galaxy
subjectfact 
ring galaxyhas definition A galaxy with a ring-like appearance. The ring contains luminous blue stars, but relatively little luminous matter is present in the central regions. It is believed that such a system was an ordinary galaxy that recently suffered a head-on collision with another galaxy.has source: Silk, J. 1990 The Big Bang, W. H. Publishers, New York, 2001-09-27 09:31:10.0
is a kind of galaxy2001-09-27 09:31:10.0
galaxyhas number of stars 106 to 10122001-09-27 09:31:09.0
has catalog galaxy catalog2001-09-27 09:31:09.0
celestial bodyhas spectra2001-09-27 09:30:09.0
physical objecthas location or center of gravity2001-09-27 09:27:27.0
has angular momentum2001-09-27 09:27:27.0
has mass2001-09-27 09:27:27.0
has velocity2001-09-27 09:27:27.0
has momentum2001-09-27 09:27:27.0
has temperature2001-09-27 09:27:27.0
has volume2001-09-27 09:27:27.0
has extent2001-09-27 09:27:27.0
has material2001-09-27 09:27:27.0