Black holes can merge and release enormous energy.
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Black holes can bend time.
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Space is completely silent.
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The Earth's gravity keeps the atmosphere in place.
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The International Space Station is one of the most complex engineering projects ever built.
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A day on Mercury lasts longer than a year on Mercury.
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The James Webb Space Telescope observes distant galaxies in infrared light.
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The observable universe is about 93 billion light‑years wide.
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The Moon was formed billions of years ago.
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