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Tarun Yadav answered this
A Galaxy is a huge system of billions of stars and clouds of dust and gases and planets.
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Anmol answered this
A large collection of stars, dust and hydrogen gas isolated in space form a galaxy.A galaxy has on an average of 100 billion stars and there are 1011 galaxies. For example- milky way galaxy and Andromeda galaxy.
Galaxies are classified according to their shape and size.
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jagathisraj... answered this
a galaxy is a huge system of billion of starsand clouds of dust