If you fell into a black hole, time would appear to stop for outside observers.
Fact #2729
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The center of the Milky Way contains a supermassive black hole.
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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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The observable universe is about 93 billion light‑years wide.
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The Moon has no atmosphere like Earth's.
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The Moon always shows the same face to Earth.
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The Earth's atmosphere gradually thins into outer space.
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Neptune has some of the fastest winds in the solar system.
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Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
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