A spiral galaxy is a type of galaxy characterized by a central bulge of old Population II stars surrounded by a rotating disc of younger Population I stars. A spiral galaxy maintains its spiral arms due to density wave theory.
Spiral galaxies
Below is a list of notable spiral galaxies with their own articles. The classification column refers to the galaxy morphological classification used by astronomers to describe galaxy structure.
See also
References
- ^ Normandin, George (2002). "Barred Spiral Galaxy NGC 1090". Retrieved Dec. 26, 2006
- ^ Matthews, Doug & Betts, Charles (2003). "NGC 2541". Retrieved Dec. 26 2006.
- ^ Frommert, Hartmut. "NGC 2715" Archived 2005-02-22 at the Wayback Machine. Retrieved on December 26, 2006.
- ^ Centre de Données astronomiques de Strasbourg. "VizieR Detailed Page". Retrieved on December 26, 2006.
- ^ a b c d e Celestia version 1.4.1. Laurel, Chris, 2006.
- ^ a b SIMBAD service at Centre de Données astronomiques de Strasbourg. "SIMBAD". Retrieved on April 9, 2013.
