what is galaxy.......
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A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity.
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A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems. A galaxy is held together by gravity. Our galaxy, the Milky Way, also has a supermassive black hole in the middle. ... Some scientists think there could be as many as one hundred billion galaxies in the universe.
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