The Pioneer 10 spacecraft was the first to travel through the asteroid belt.
Fact #1023
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A day on Venus is longer than its year.
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Solar eclipses occur when the Moon blocks the Sun from Earth's view.
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Dark energy is thought to drive the accelerating expansion of the universe.
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Black holes can slow time so much that seconds near them equal years far away.
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The observable universe is about 93 billion light‑years wide.
Fact #1754 · Space
The observable universe is about 93 billion light‑years wide.
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The International Space Station is one of the most complex engineering projects ever built.
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The Voyager Golden Record was sent into space containing sounds and images from Earth.
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