The Voyager probes carry golden records with sounds and images of Earth — a message to any civilization that might find them.
Fact #3690
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Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
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There are rogue planets drifting through space with no star at all.
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The light you see from some stars today began traveling before humans existed.
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The Moon's surface is covered in craters.
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The Earth's magnetic field protects against solar radiation.
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Saturn's rings are made primarily of ice particles and rocky debris.
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Neutron stars can spin hundreds of times per second.
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The Earth's axis is tilted about 23.5 degrees.
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