The International Space Station orbits Earth every 90 minutes.
Fact #1539
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There are more stars in the universe than grains of sand on Earth.
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A day on Mars is slightly longer than a day on Earth.
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The James Webb Space Telescope observes distant galaxies in infrared light.
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The largest volcano is on Mars.
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The Pioneer 10 spacecraft was the first to travel through the asteroid belt.
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The Earth's orbit around the Sun is slightly elliptical.
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There are black holes at galaxy centers.
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The light you see from some stars today began traveling before humans existed.
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