A day on Venus is longer than a year on Venus due to its extremely slow retrograde rotation.
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Exoplanets have been discovered in habitable zones around distant stars.
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The Voyager 1 spacecraft is the farthest human-made object from Earth and still communicates with us.
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The light you see from some stars today began traveling before humans existed.
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The Earth's orbit determines the length of the year.
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Space is completely silent.
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The Milky Way is estimated to contain hundreds of billions of stars.
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Venus is sometimes called Earth's sister planet.
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