galaxy cluster concept from the Astronomy knowledge base

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physical object > natural object > celestial body > collection of stars > collection of galaxies > galaxy cluster

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galaxy cluster

subject fact

galaxy cluster has number of galaxies 10² to 10³ (order of magnitude) has source: Croswell, K. 1995 The Alchemy of the Heavens, Anchor Books, 2001-09-27 09:31:06.0
has definition A conglomeration of hundreds or thousands of galaxies. The nearest large galaxy cluster is the Virgo cluster.
has definition An aggregate of galaxies. Bautz and Morgan divide them into three morphological types: type I contains a supergiant cD galaxy; Coma is type II, type III contains no members significantly brighter than the general bright population. Virgo is type III. 21 known X-ray sources are associated with clusters of galaxies. has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:31:06.0
is a kind of collection of galaxies

collection of stars has number of stars 2001-09-27 09:30:53.0
has catalog catalog about star systems

celestial body has spectra 2001-09-27 09:30:09.0

physical object has location or center of gravity 2001-09-27 09:27:27.0
has angular momentum
has mass
has velocity
has momentum
has temperature
has volume
has extent
has material

Kinds of galaxy cluster :

Centaurus cluster (7 facts) (3U 1247-41) - A cluster of galaxies. Its radio counterpart is compact and located inside NGC 4696.
galaxy group (7 kinds, 33 facts) - A small gathering of galaxies, smaller than a cluster. The Milky Way is part of the Local Group, which contains about thirty galaxies.
Hercules cluster (7 facts) (3U 1551 + 15) - An unsymmetrical cluster. Half of the galaxies are spiral or irregular and about half elliptical or S0. It contains a rather large number of disturbed and peculiar galaxies. The "missing mass", if present, must constitute more than 95% of the total.
Perseus cluster (8 facts) - A diffuse, irregular cluster (richness class 2) dominated by and centered on the Seyfert galaxy NGC 1275 (Perseus A). Mass required to bind the cluster, greater than 10¹⁵ M_sun.
rich cluster (2 kinds, 23 facts) - Galaxy cluster with 100 or more galaxies within a volume comparable to that of a loose group. Scale of cluster, about 1 Mpc.
Sculptor Group (6 facts) - The nearest group of galaxies to the Local Group.

Next collection of galaxies: Great Wall Up: collection of galaxies Previous collection of galaxies: binary galaxy

galaxy cluster	has number of galaxies 10² to 10³ (order of magnitude)
	has definition A conglomeration of hundreds or thousands of galaxies. The nearest large galaxy cluster is the Virgo cluster.
	has definition An aggregate of galaxies. Bautz and Morgan divide them into three morphological types: type I contains a supergiant cD galaxy; Coma is type II, type III contains no members significantly brighter than the general bright population. Virgo is type III. 21 known X-ray sources are associated with clusters of galaxies.
	is a kind of collection of galaxies
collection of stars	has number of stars
collection of stars	has catalog catalog about star systems
celestial body	has spectra
physical object	has location or center of gravity
	has angular momentum
	has mass
	has velocity
	has momentum
	has temperature
	has volume
	has extent
	has material