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JunoCam tracks Jupiter's moons in the "Marble Movie"
JunoCam tracks Jupiter's moons in the "Marble Movie" This 46-frame animation covers about 6 weeks of Juno's first long orbit of Jupiter, from July 10 to August 21, 2016. Each frame contains a stack of one Io's orbit worth of moon images; each frame advances in time from the previous one by 21 hours, or half an Io orbital period. NASA / JPL / SwRI / MSSS / Gerald Eichstaedt