Some stars you see in the sky no longer exist.
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There are planets made of diamond.
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The observable universe spans billions of light-years.
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Neutron stars can spin hundreds of times per second.
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Black holes can slow time so much that seconds near them equal years far away.
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The light you see from some stars today began traveling before humans existed.
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The Kuiper Belt contains many icy bodies beyond Neptune.
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The Oort Cloud is a theoretical shell of icy objects surrounding the solar system.
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The Milky Way is estimated to contain hundreds of billions of stars.
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