Jupiters Europa from Spacecraft Juno

APOD: 2022 October 3 - Jupiters Europa from Spacecraft Juno

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2022 October 3
The featured image shows a partly illuminated
light-colored sphere with a complex pattern of brown
Please see the explanation for more detailed information.

Jupiter's Europa from Spacecraft Juno
Image Credit & License: NASA, JPL-Caltech, SwRI, MSSS; Processing: Andrea Luck

Explanation: What mysteries might be solved by peering into this crystal ball? In this case, the ball is actually a moon of Jupiter, the crystals are ice, and the moon is not only dirty but cracked beyond repair. Nevertheless, speculation is rampant that oceans exist under Europa's fractured ice-plains that could support life. Europa, roughly the size of Earth's Moon, is pictured here in an image taken a few days ago when the Jupiter-orbiting robotic spacecraft Juno passed within 325 kilometers of its streaked and shifting surface. Underground oceans are thought likely because Europa undergoes global flexing due to its changing gravitational attraction with Jupiter during its slightly elliptical orbit, and this flexing heats the interior. Studying Juno's close-up images may further humanity's understanding not only of Europa and the early Solar System but also of the possibility that life exists elsewhere in the universe.

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