Saturn is so light relative to its volume that it would float in water if a large enough ocean existed.
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The Moon has lower gravity than Earth.
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The Sun occasionally emits powerful solar flares.
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Space is completely silent.
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The Milky Way galaxy contains billions of stars.
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The light you see from some stars today began traveling before humans existed.
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The observable universe is about 93 billion light‑years wide.
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The Moon's surface is covered in craters.
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