Most of the universe is made of unknown dark matter and dark energy.
Fact #2735
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Black holes can slow time so much that seconds near them equal years far away.
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Black holes can slow time so much that seconds near them equal years far away.
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The light you see from some stars today began traveling before humans existed.
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The observable universe is about 93 billion light‑years wide.
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The center of the Milky Way contains a supermassive black hole.
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Black holes can slow time so much that seconds near them equal years far away.
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The Earth completes one full rotation approximately every 24 hours.
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The Earth's gravity keeps the Moon in orbit.
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