The closest star to our solar system, Proxima Centauri, is about 4.24 light-years away.
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The Sun accounts for more than 99% of the mass of our solar system.
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The Earth completes one full rotation approximately every 24 hours.
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The Pioneer 10 spacecraft was the first to travel through the asteroid belt.
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The light you see from some stars today began traveling before humans existed.
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The telescope expanded understanding of the universe.
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Asteroids vary widely in size and composition.
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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.
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