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What is a Galaxy? (Everywhere we look in the sky there are galaxies of…
What is a Galaxy?
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Some have a bar of stars across the centre, with arms attached at either end.
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A galaxy is a group of stars, clouds of gas, and dust particles that move together through the universe.
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The sun, Earth, and the other planets of the solar system are part of the Milky Way galaxy.
Most galaxies move through the universe as part of clusters, or groups, of galaxies.