Rogue black holes wander through galaxies at millions of miles per hour after being ejected from their original positions.
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The Earth's core temperature rivals the surface of the Sun.
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The International Space Station travels at about 28,000 kilometers per hour.
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Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
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The Moon's surface is covered with regolith, a layer of loose rock and dust.
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The Milky Way contains regions of active star formation.
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There are stars older than the Milky Way.
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Neptune is known for its deep blue color.
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The light you see from some stars today began traveling before humans existed.
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