Image of Jupiter with three moons, Europa, Callisto and Io
Source: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)
Published: April 9, 2015

Three moons and their shadows parade across Jupiter. Europa has entered the frame at lower left. Slower-moving Callisto is above and to the right of Europa. Fastest-moving Io is approaching the eastern limb of the planet. Europa's shadow is toward the left side of the image and Callisto's shadow to the right. (The moons' orbital velocities are proportionally slower with increasing distance from the planet.)

For more views and additional information, visit HubbleSite.

ENLARGE

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