What is Galaxy.....?
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a system of millions of stars planets comets nebulas intersettler dust and mass even dark matter and energy...
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➽ A galaxy is a group of many stars, with gas, dust, and dark matter. The name 'galaxy' is taken from the Greek word galaxia meaning milky, a reference to our own galaxy, the Milky Way. Gravity holds galaxies together against the general expansion of the universe.
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