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[This is early data from the testing phase of NASA's Transiting Exoplanet Survey Satellite (TESS).]

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[It captured not only a comet, but also a number of other interesting features.]

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[NEOWISE Comet C/2018 N1]

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[Notice how the comet tail changes direction.]

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[This change is due to the solar wind.]

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[These are variable stars whose brightness changes over time.]

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[All the other fixed spots are stars. Their appearance results from image processing that

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makes the comet and variable stars more visible.]

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[TESS even saw a faint wisp of reflected light coming from Mars.]

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[Last, but not least, this view is filled with asteroids. They're visible as small moving white dots.]

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[Quickly running the video back and forth makes their movement more apparent.]

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