There are stars whose light began its journey toward Earth before the Sun even formed.
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Exoplanets have been discovered in habitable zones around distant stars.
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The universe has no center.
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The Moon slowly moves away from Earth by a few centimeters each year.
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The Earth is not perfectly round.
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Saturn's rings are made primarily of ice particles and rocky debris.
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Venus has the longest day of any planet in the solar system.
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Comets orbit the Sun in elongated paths.
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Black holes can bend light through gravitational lensing.
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