globular cluster

noun Astronomy.
a comparatively older, spherically symmetrical, compact group of up to a million old stars, held together by mutual gravitation, that are located in the galactic halo and move in giant and highly eccentric orbits around the galactic center.


Origin:
1855–60

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Collins
World English Dictionary
globular cluster
 
n
astronomy a densely populated spheroidal star cluster with the highest concentration of stars near its centre, found in the galactic halo and in other galaxies

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
globular cluster   (glŏb'yə-lər)  Pronunciation Key 
A spherical mass made up of thousands to hundreds of thousands of densely packed stars of nearly the same age (typically very old). Globular clusters occupy the inner regions of a galactic halo and revolve around the nucleus of galaxies in highly elliptical orbits inclined to the disk of the spiral arms. There are approximately 150 of these clusters in the Milky Way. It is believed that globular clusters can provide information about the evolution and lifespan of stars. Compare open cluster.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The central object almost reminds me of viewing a globular cluster through a backyard telescope.
Singular stars shine strong in this infrared image of the same globular cluster.
Humans avoid extinction by transmitting their genome to a globular cluster, where it's picked up by starfish aliens.
Images for globular cluster
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