The Sun accounts for about 99.86% of all the mass in the solar system.
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The Moon always shows the same face to Earth.
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Solar flares originate from the Sun's surface.
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Venus has the longest day of any planet in the solar system.
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The Rosetta mission successfully landed a probe on a comet in 2014.
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Exoplanets have been discovered in habitable zones around distant stars.
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Saturn has dozens of known moons.
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The sunk cost fallacy influences people to continue losing efforts.
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Black holes can slow time so much that seconds near them equal years far away.
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