Jupiter rise from Metis, the innermost known Moon of Jupiter. The dark circle in the second picture is Io's shadow! #jupiter #spacepic.twitter.com/dbreXjYvrv
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Io orbits every 42 hours and Jupiters is a large enough projection surface that it basically happens daily I think.
(No idea if jupiter's atmosphere notices it)
because it would be fun to see Io's shadow trail turbulence patterns
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