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21 March, 22:45

What is a galaxy? How many galaxies are there and how many stars does each galaxy hold?

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  1. 21 March, 23:16
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    A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter. Scientists estimate that there are 200 billion to 400 billion - yes, that's billion with a "b" - stars in the Milky Way galaxy. Our Milky Way galaxy is just one of the many galaxies in our universe.
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