The universe is so large that light from most of it will never reach Earth.
Fact #2241
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The Moon's surface temperature varies dramatically.
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Saturn's rings are made primarily of ice particles and rocky debris.
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The light you see from some stars today began traveling before humans existed.
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Jupiter has a magnetic field stronger than Earth's.
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The Rosetta mission successfully landed a probe on a comet in 2014.
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The Wow! signal was a strong radio signal detected in 1977 that has never been fully explained.
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The Earth orbits the Sun once every year.
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The Voyager Golden Record was sent into space containing sounds and images from Earth.
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