The Earth's gravity keeps the Moon in orbit.
Fact #283
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Time moves slower in stronger gravitational fields.
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Venus has the longest day of any planet in the solar system.
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The Earth's magnetic field shields the planet from solar wind.
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Venus is sometimes called Earth's sister planet.
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The light you see from some stars today began traveling before humans existed.
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The Earth's gravity keeps the atmosphere in place.
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The observable universe is about 93 billion light‑years wide.
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A teaspoon of neutron star material would weigh billions of tons.
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