Some black holes may contain the mass of billions of Suns.
Fact #2702
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Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
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Mercury has extreme temperature differences.
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The Moon's surface is covered with regolith, a layer of loose rock and dust.
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The Moon has no liquid water on its surface today.
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Mercury is the closest planet to the Sun.
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The Earth completes one full rotation approximately every 24 hours.
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The Earth orbits the Sun once every year.
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Black holes can slow time so much that seconds near them equal years far away.
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