The Kuiper Belt beyond Neptune contains hundreds of thousands of icy objects — Pluto is the largest known.
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The Earth's gravity keeps the Moon in orbit.
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The observable universe is about 93 billion light‑years wide.
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Some galaxies appear distorted due to gravitational effects.
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The Fermi Paradox questions why extraterrestrial life has not been observed.
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The Sun makes up 99.8% of solar mass.
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There are stars older than the Milky Way.
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