![]() ![]() This follows on from research in 2011 from the Galileo spacecraft, showing that there likely is a magma ocean under the moon. One of these active volcanoes is named Prometheus, not to be confused with the moon of Saturn with the same name. The active volcanoes are erupting constantly and can fire ash and cinders 300 km above the surrounding surface. Instead, Io boasts large lava flow fields and lava lakes confined in volcanic craters. A newly released study suggests that a magma ocean - a great conductor of heat -Ĭould explain why the hotspots are in a different location than expected Some of these volcanoes are dormant, or extinct volcanoes. While the Galilean moons are spherical, all of Jupiter's, much smaller, remaining moons have irregular forms because of their weaker self-gravitation. The three inner moonsIo, Europa, Ganymedeare in a 4:2:1 orbital resonance with each other. Galileo spies Ios hot lava, tall mountains Galileo spots new volcanoes on Io Galileo images reveal lakes, snow, geysers on Io Close ups of lava flow on. Starting with the most extreme, Io is a volcanic planet, but what has intrigued scientists for decades is the volcanoes appear to be offset from where computer models predict. The smaller ones, Io and Europa, are about the size of the Moon. , which should launch in 2022 and arrive in 2030. For a close-up view, space fans will need to wait for aĮuropean mission called JUICE (JUpiter ICy moons Explorer) The reason for Ios missing mountains is that the moon is deficient in silica-rich volcanic materials that produce steep cinder cones, Williams says. May get distant glimpses of the moons after it arrives in 2016. While NASA studied the Jovian moons in detail in the 1990s and early 2000s with the Galileo mission, scientists have been anxious for another visit to Jupiter that would be longer than just a flyby. ![]() At the center of the caldera is a reddish hot spot. Although they may have dramatically different qualities - from the hellish lava flows of Io to the potentially life-giving sub-surface ocean of Europa - these oceans are all driven by tidal interactions with Jupiter. Pele is surrounded by a ring of sulphur, deposited by a volcanic plume that is 1,280 kilometers (800 miles) in diameter. The mountain is about 100 kilometers wide × 200 kilometers long and rises 10 kilometers above the surrounding. It now looks like all four moons discovered by Galileo in the 1600s - Io, Europa, Callisto and Ganymede - could have oceans of some kind, magma or liquid water. ![]() , scientists found extensive evidence of a magma ocean underneath the surface of Io, a moon of Jupiter. ![]()
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