The Moon was formed billions of years ago.
Fact #313
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In 1977, a strong narrowband radio signal known as the 'Wow! signal' was detected from space.
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Project Blue Book investigated reports of unidentified flying objects.
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The Earth's rotation causes day and night cycles.
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The observable universe is about 93 billion light‑years wide.
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Quasars are extremely bright objects powered by supermassive black holes.
Fact #1601 · Space
The center of the Milky Way contains a supermassive black hole.
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Some pulsars emit beams of radiation like cosmic lighthouses.
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Rogue planets drift through space without orbiting a star.
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