The Moon's gravity affects ocean tides.
Fact #195
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The event horizon marks the boundary around a black hole.
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There are rogue planets drifting through space with no star at all.
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The observable universe spans billions of light-years.
Fact #1611 · Space
The Hubble Space Telescope revolutionized deep-space imaging.
Fact #1029 · Space
The Voyager 1 spacecraft is the farthest human-made object from Earth and still communicates with us.
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Mercury has extreme temperature differences.
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The Earth completes one full rotation approximately every 24 hours.
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The Milky Way is on a slow collision course with Andromeda.
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