The universe has no known center.
Fact #2737
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The Earth's orbit determines the length of the year.
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Black holes can slow time so much that seconds near them equal years far away.
Fact #1940 · Space
The observable universe is about 93 billion light‑years wide.
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The light you see from some stars today began traveling before humans existed.
Fact #1726 · Space
The Earth is not perfectly round.
Fact #1719 · Space
Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
Fact #1787 · Space
The observable universe is about 93 billion light‑years wide.
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The Wow! signal was a strong radio signal detected in 1977 that has never been fully explained.
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