Definition for Galaxy
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Revision as of 00:00, 7 August 2013 by Nite n day (Talk | contribs) (Created page with "A galaxy is a massive, gravitationally bound system consisting of stars, stellar remnants, an interstellar medium of gas and dust, and, dark matter, an important but poorly under...")
A galaxy is a massive, gravitationally bound system consisting of stars, stellar remnants, an interstellar medium of gas and dust, and, dark matter, an important but poorly understood component.
