Coma cluster

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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.

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).
References in periodicals archive ?
Swinging to the south, he picked up another Abell 1656 member, NCC 4798, and things once again became busy for the observing team.
There, the appearance of Abell 1656 in a 13-inch reflector is described in Coe's informal, nontechnical manner.
Many large-telescope users are familiar with the rich northern clusters Abell 426 in Perseus, Abell 1367 in Leo, and Abell 1656 in Coma Berenices (which can be found at, respectively, right ascension 3h 20m, declination +41.