John Donald Fernie
Contributor
Professor Emeritus, Department of Astronomy and Astrophysics, University of Toronto, Ontario. Author of Setting Sail for the Universe: Astronomers and their Discoveries.
Primary Contributions (15)
Star cluster, either of two general types of stellar assemblages held together by the mutual gravitational attraction of its members, which are physically related through common origin. The two types are open (formerly called galactic) clusters and globular clusters. Open clusters contain from aβ¦
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