There are stars so dense a spoonful would weigh billions of tons.
Fact #2275
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The light you see from some stars today began traveling before humans existed.
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Quasars are extremely bright objects powered by supermassive black holes.
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There are black holes at galaxy centers.
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The Milky Way is estimated to be over 100,000 light-years wide.
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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 Moon is slowly moving away from Earth.
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