A magnetar is a type of neutron star with a magnetic field so powerful it could erase a credit card from halfway across the solar system.
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Gravitational waves were detected a century after Einstein predicted them.
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The Sun makes up 99.8% of solar mass.
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The observable universe is about 93 billion light‑years wide.
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The light you see from some stars today began traveling before humans existed.
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The Hubble Space Telescope has captured deep images of distant galaxies.
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Time moves slower in stronger gravitational fields.
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Black holes can bend time.
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Rogue planets drift through space without orbiting a star.
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