Some galaxies appear distorted due to gravitational effects.
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The observable universe is about 93 billion light‑years wide.
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The Moon's gravity influences ocean tides.
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Quasars are extremely bright objects powered by supermassive black holes.
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Black holes can slow time so much that seconds near them equal years far away.
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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 heliosphere protects the solar system from interstellar radiation.
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The Fermi Paradox questions why extraterrestrial life has not been observed.
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The light you see from some stars today began traveling before humans existed.
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