The first space station was Soviet Salyut 1 — launched in 1971, it was occupied for 23 days.
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The universe has no center.
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Some galaxies appear distorted due to gravitational effects.
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There are rogue planets drifting through space with no star at all.
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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 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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The Earth orbits the Sun once every year.
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