There are distant galaxies.
Fact #2398
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The observable universe is about 93 billion light‑years wide.
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Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
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The Sun makes up 99.8% of solar mass.
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The Earth's atmosphere is layered into troposphere, stratosphere, and beyond.
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The light you see from some stars today began traveling before humans existed.
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Neptune appears blue because of methane in its atmosphere.
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The Earth's orbit around the Sun is slightly elliptical.
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The Voyager 1 spacecraft is the farthest human-made object from Earth and still communicates with us.
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