New Horizons flew past Pluto in 2015 and is now beyond the solar system.
Fact #6273
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Saturn could float in water because its density is low.
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Black holes can slow time so much that seconds near them equal years far away.
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The Moon always shows the same face to Earth.
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The Moon has no breathable atmosphere.
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The Moon has lower gravity than Earth.
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The Moon's gravity affects ocean tides.
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The center of the Milky Way contains a supermassive black hole.
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Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
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