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The animation is made of 642 single frames from a series of 3,227 images shot of Jupiter over a time window of 4.2 hours.  The images were taken with the CSU Fresno Campus Observatory 16” LX200 at f/38 and the SBIG ST-10XME CCD camera by Greg Morgan and Fred Ringwald on 3/25/03.  Jupiter rotated about 150 degrees during this series.  Io made a transit of Jupiter’s 42 arc second disk casting its inky black shadow onto Jupiter’s swirling cloud tops.  Europa entered the field of view near the end of the sequence.  The Great Red Spot crossed Jupiter’s central meridian just after the egress of Io’s shadow.  The  frames were assembled into a movie, with the help of Kevin Hansen, that allowed the Jovian system dynamics to come alive!  Click here for more information from the write-up in The Observer.