The asteroid belt between Mars and Jupiter contains millions of asteroids but is mostly empty space.
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The Earth completes one full rotation approximately every 24 hours.
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The observable universe is about 93 billion light‑years wide.
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Venus has a thick atmosphere that traps heat.
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Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
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The observable universe is about 93 billion light‑years wide.
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The Kepler mission searched for Earth-like exoplanets.
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Cosmic rays constantly bombard Earth from space.
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The Earth orbits the Sun at about 30 kilometers per second.
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