NASA’s Juno Gets a Close-Up Look at Lava Lakes on Jupiter’s Moon Io

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NASA’s Juno Gets a Close-Up Look at Lava Lakes on Jupiter’s Moon Io
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Infrared imagery from the solar-powered spacecraft heats up the discussion on the inner workings of Jupiter’s hottest moon.

The Juno Cam instrument aboard NASA’s Juno spacecraft captured two volcanic plumes rising above the horizon of Jupiter ’s moon Io. The image was taken Feb. 3 from a distance of about 2,400 miles .

In both May and October 2023, Juno flew by Io, coming within about 21,700 miles and 8,100 miles , respectively. Among Juno’s instruments getting a good look at the beguiling moon was JIRAM. This animation is an artist’s concept of Loki Patera, a lava lake on Jupiter’s moon Io, made using data from the JunoCam imager aboard NASA’s Juno spacecraft. With multiple islands in its interior, Loki is a depression filled with magma and rimmed with molten lava. NASA/JPL-Caltech/SwRI/MSSS

JIRAM data suggests that most of the surface of these Io hot spots is composed of a rocky crust that moves up and down cyclically as one contiguous surface due to the central upwelling of magma. In this hypothesis, because the crust touches the lake’s walls, friction keeps it from sliding, causing it to deform and eventually break, exposing lava just below the surface.

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