globular cluster, Any large group of old, Population II (see Populations I and II) stars closely packed in a symmetrical, somewhat spherical form. About 150 have been identified in the Milky Way Galaxy. Most are distributed in a spherical volume above and below the Galaxy’s disk (see galactic halo). Globular clusters contain many more stars (10,000–1,000,000) than open clusters do and can be several hundred light-years in diameter. Because they are so distant from the solar system, most are not visible to the unaided eye. Omega Centauri and a few others can be seen without a telescope as hazy patches of light.
globular cluster Article
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Arthur Eddington Summary
Arthur Eddington was an English astronomer, physicist, and mathematician who did his greatest work in astrophysics, investigating the motion, internal structure, and evolution of stars. He also was the first expositor of the theory of relativity in the English language. Eddington was the son of the