The International Space Station is visible to over 90% of the human population at some point during its orbit.
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The Earth spins at 1000 mph.
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Some galaxies are trillions of miles wide.
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The Bell Labs experiment led to the discovery of the cosmic microwave background.
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The light you see from some stars today began traveling before humans existed.
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Saturn's rings are made primarily of ice particles and rocky debris.
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The Milky Way contains regions of active star formation.
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The Milky Way galaxy contains billions of stars.
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There are more stars in the universe than grains of sand on Earth.
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