Pluto has a heart-shaped nitrogen ice glacier on its surface called Tombaugh Regio.
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Some stars appear to dim irregularly for reasons that are still studied.
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The Kepler mission searched for Earth-like exoplanets.
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Venus is sometimes called Earth's sister planet.
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The telescope expanded understanding of the universe.
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The Moon was likely formed after a massive collision with early Earth.
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Neptune is the farthest known major planet from the Sun.
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There are rogue planets drifting through space with no star at all.
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The Yellowstone supervolcano is one of the largest volcanic systems in the world.
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