Coma cluster

(redirected from Coma cluster of galaxies)

Coma cluster

A very rich cluster of galaxies, near the north galactic pole, in the constellation Coma Berenices that contains at least 1000 bright elliptical and S0 galaxies. It is about 6 megaparsecs in diameter and is in the form of two equal subclumps, each with a central dominant galaxy associated with a radio source: an elliptical, NGC 4889, and an S0 galaxy, NGC 4874. The cluster is about 90 megaparsecs distant and is moving away from Earth at approximately 6700 km s–1.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

Coma cluster

[′kō·mə ‚kləs·tər]
(astronomy)
A group of over 1000 bright galaxies having a recession velocity of about 4300 miles (6900 kilometers) per second.
An open cluster of about 100 stars at a distance of about 80 parsecs (1.5 × c1015 miles or 2.5 × 1015 kilometers).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
They are likely members of the Coma Cluster of Galaxies, which is one of the densest clusters known, containing thousands of galaxies.
William was now on the verge of sweeping through the heart of the Coma Cluster of galaxies, Abell 1656.
Zwicky noted that the radial velocities of the galaxies in the Coma Cluster of galaxies (Figure 3) were much larger than what would be expected by assuming that the galaxies have the same ratio of mass to light, M/L, as the Sun.
TEHRAN (FNA)- A team of astronomers has discovered enormous arms of hot gas in the Coma cluster of galaxies by using NASA's Chandra X-ray Observatory and ESA's XMM-Newton.
While investigating the great Coma Cluster of galaxies, Zwicky chanced upon a dramatic difference between prevailing theory and observation.
The story of dark matter began in 1933, when the brilliant but eccentric Caltech astrophysicist Fritz Zwicky recognized something strange in the Coma Cluster of galaxies. Although Coma's galaxies appear to be bound together by gravity, they are moving far too fast to avoid flying apart and breaking up the cluster.
The classic late 1970s observing guide Burnham's Celestial Handbook says: "NGC 4889 and 4874 are the only two members of the Coma Cluster of Galaxies which are likely to be detected in most amateur telescopes." But one spring night in 1983 I spent two hours in the cluster with my 8-inch f/6 Newtonian, guided only by a photo from the Palomar Observatory Sky Survey.
THE COMA CLUSTER of galaxies is an awe-inspiring sight -- one of many vast astronomical constructs that can put a good dent in any sense of self-importance humans might have.