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physical object > natural object > celestial body > collection of stars > collection of galaxies > galaxy cluster > Hercules cluster |
Hercules cluster comparison table |
Subject | has number of galaxie | is part of | is a kind of | has redshift | is an instance of | has synonym | has definition |
---|---|---|---|---|---|---|---|
galaxy cluster | 102 to 103 (order of magnitude) | collection of galaxies | 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. | ||||
Hercules cluster | 75 | Local Supercluster | z = 0.036 | galaxy cluster | 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. |
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