what is galaxy..................
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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. ... This is the picture taken by the Hubble Space Telescope showing thousands of galaxies.
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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 super massive black hole in the middle .
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