[This is early data from the testing phase of NASA's Transiting Exoplanet Survey Satellite (TESS).]
[It captured not only a comet, but also a number of other interesting features.]
[NEOWISE Comet C/2018 N1]
[Notice how the comet tail changes direction.]
[This change is due to the solar wind.]
[These are variable stars whose brightness changes over time.]
[All the other fixed spots are stars. Their appearance results from image processing that
makes the comet and variable stars more visible.]
[TESS even saw a faint wisp of reflected light coming from Mars.]
[Last, but not least, this view is filled with asteroids. They're visible as small moving white dots.]
[Quickly running the video back and forth makes their movement more apparent.]