The cosmic microwave background radiation is the afterglow of the Big Bang and can be detected in every direction in space.
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Exoplanets have been discovered in habitable zones around distant stars.
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The observable universe is about 93 billion light‑years wide.
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There are rogue planets drifting through space with no star at all.
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Asteroids vary widely in size and composition.
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The James Webb Space Telescope observes distant galaxies in infrared light.
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Jupiter is the largest planet in the solar system.
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Black holes can merge and release enormous energy.
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The largest volcano is on Mars.
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