Jupiter's Great Red Spot and Ganymede's Shadow (Full-Disk, Color)
Hubble treats astronomers to gorgeous close-up views of the eerie outer
planets. But it's a bit of a trick when it seems like the planet's
looking back at you! This happened on April 21, 2014, when Hubble was
being used to monitor changes in Jupiter's immense Great Red Spot (GRS)
storm. During the exposures, the shadow of the Jovian moon Ganymede
swept across the center of the GRS. This gave the giant planet the
uncanny appearance of having a pupil in the center of a
10,000-mile-diameter "eye." Momentarily, Jupiter took on the appearance
of a Cyclops planet! The shadows from Jupiter's four major satellites
routinely cross the face of Jupiter. This natural-color picture was
taken with Hubble's Wide Field Camera 3.
Source: HubbleSite
