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| Large groups of stars, dust, and gas are called galaxies. |
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Spiral galaxies, such as the Andromeda galaxy, have a bulge at the center and spiral arms. |
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| The galxy in which we live is a spiral galaxy called the Milky Way. |
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| The Milky Way is consuming a pair of nerby irregular galaxies called the Magellanic Clouds. |
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| In space, nebulas are large clouds of gas and dust that are the birthplace of stars. |
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| a global cluster is a highly consentrated group of stars that looks like a ball. |
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| Open clusters are groups of 100 or 1,000 stars that are close together relative to other stars. |
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