what is galaxy

 A galaxy is a very large group of constellations of stars. For e.g., our Milky Way Galaxy

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A Galaxy is a huge system of billions of stars and clouds of dust and gases and planets.

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 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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a galaxy is a huge system of billion of starsand clouds of dust

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