Jupiter acts as a cosmic vacuum cleaner, its gravity deflecting or capturing comets and asteroids that might otherwise hit Earth.
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The Kepler mission searched for Earth-like exoplanets.
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Rogue planets drift through space without orbiting a star.
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The surface of Venus is hidden beneath thick clouds.
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Black holes have gravitational pulls so strong that not even light can escape.
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The Milky Way galaxy contains billions of stars.
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Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
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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 Oort Cloud is a theoretical shell of icy objects surrounding the solar system.
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