The brightest globular cluster in the sky, of apparent magnitude 3.7 and width 0°.6, in Centaurus. It is also known as NGC 5139. Omega Centauri is markedly elliptical in shape, with a short axis only 80% the length of its long axis. Its actual diameter is about 180 l.y., and it is the most luminous globular known, with an absolute magnitude of −10.3. At a distance of 17 000 l.y., it is one of the closest globulars to us.
http://www.eso.org/public/images/eso0844a/
- group action
- group algebra
- group-average clustering
- group code
- group code recording
- group delay
- grouped data
- grouped mean
- grouper
- group graph
- group interval
- group mark
- Group of 20
- Group of 8
- Group of Eight
- Group of Seven
- Group of Ten
- group operation
- group representation
- groups 3–12
- group selection
- group speed (of wave)
- group table
- group theory
- group velocity