Jupiter with Europa, Io and Ganymede
May 25, 2017
Photographer: John Chumack
Summary Author: John Chumack
Featured above is Jupiter with three of its biggest moons, Europa, Io and Ganymede (the biggest moon in the solar system). At the time the photo was taken, Jupiter's Great Red Spot (GRS), which is about 2.5 times the size of the Earth, was getting ready to go around the limb. The GRS is a persistent anticyclonic storm, 22 degrees south of Jupiter's equator, with winds approaching 400 mph (640 km/h). Observations from Earth have established a minimum storm lifetime of the GRS of 350 years. Photo taken from Dayton, Ohio on May 7, 2017.