Science, Space and Technology News 2024
Jupiter’s moon Europa was captured by the JunoCam instrument aboard NASA’s Juno spacecraft during the mission’s close flyby on September 29, 2022. The images show the fractures, ridges, and bands that crisscross the moon’s surface.. Credit: NASA/JPL-Caltech/SwRI/MSSS, Björn Jónsson ’s Juno has provided images that support the theory of true polar wander on Europa, showing the moon’s ice shell has shifted.
“True polar wander occurs if Europa’s icy shell is decoupled from its rocky interior, resulting in high stress levels on the shell, which lead to predictable fracture patterns,” said Candy Hansen, a Juno co-investigator who leads planning for JunoCam at the Planetary Science Institute in Tucson, Arizona.
This annotated image of Europa’s surface from Juno’s SRU shows the location of a double ridge running east-west with possible plume stains and the chaos feature the team calls “the Platypus” . These features hint at current surface activity and the presence of subsurface liquid water on the icy Jovian moon. Credit: NASA/JPL-Caltech/SwRIAlthough all five Europa images from Juno are high-resolution, the image from the spacecraft’s black-and-white SRU offers the most detail.
For the Juno team, these formations support the idea that Europa’s ice shell may give way in locations where pockets of briny water from the subsurface ocean are present beneath the surface.
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