a large systems of stars held together by mutual gravition what
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A galaxy is a large system of stars held together by mutual gravitation and isolated from similar systems by vast regions of space. ... The Milky Way Galaxy is 100,000- 120,000 light years across which means it probably contains about 100-400 billion stars.
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2 A Galaxy is a large system of stars held together by mutual gravitation and isolated from similar systems by vast regions of space. The Milky way galaxy is
100, 000- 120,000 light year across which means it probably contains about 100-400 billions of star....
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