Ring galaxy: Difference between revisions
wikademia>A2Kafir No edit summary |
wikademia>Cyde m Added link to APOD |
||
| Line 3: | Line 3: | ||
[[Hoag's Object]], discovered by [[Art Hoag]] in [[1950]] is an example of such a galaxy. | [[Hoag's Object]], discovered by [[Art Hoag]] in [[1950]] is an example of such a galaxy. | ||
== See Also == | |||
*[http://antwrp.gsfc.nasa.gov/apod/ap020909.html Hoag's Object] at [[Astronomy Picture of the Day]]. | |||
{{galaxy-stub}} | {{galaxy-stub}} | ||
[[Category:Ring galaxies|*]] | [[Category:Ring galaxies|*]] | ||
Revision as of 01:13, 12 November 2005
A ring galaxy is a galaxy with a ring-like appearance. The ring consists of massive, relatively young blue stars, which are extremely bright. The central region contains relatively little luminous matter. Astronomers believe that ring galaxies are formed when a smaller galaxy passes through the center of a larger galaxy. Because most of a galaxy consists of empty space, this "collision" rarely results in any actual collisions between stars. However the gravitational disruptions caused by such an event could cause a wave of star formation to move through the larger galaxy.
Hoag's Object, discovered by Art Hoag in 1950 is an example of such a galaxy.
See Also
 |
This galaxy-related article is a stub. You can help Wikipedia by expanding it. |