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NASA’s Juno probe captures wonderful views of Jupiter’s volcanic moon Io (video)

April 20, 2024
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NASA’s Juno probe captures wonderful views of Jupiter’s volcanic moon Io (video)
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The 4 greatest moons of Jupiter aren’t simply blurry smudges in Galileo’s telescope anymore.

The Italian astronomer Galileo Galilei found Ganymede, Callisto, Europa and Io again in 1610, which explains why they’re referred to as the Galilean moons. We have realized quite a bit about these unique our bodies prior to now 400 years due to ever-improving telescope views and close-up imagery snapped by voyaging spacecraft like NASA’s Juno Jupiter orbiter.

Certainly, Juno just lately carried out two shut flybys of Io, probably the most volcanically lively physique within the photo voltaic system, and information from the encounters is wowing scientists. 

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Associated: NASA’s Juno probe sees lively volcanic eruptions on Jupiter’s volcanic moon Io (pictures)

a close-up view of jupiter's volcanic moon io against the blackness of space

The JunoCam instrument on NASA’s Juno captured this view of Jupiter’s moon Io — with the first-ever picture of its south polar area — in the course of the spacecraft’s sixtieth flyby of Jupiter on April 9.  (Picture credit score: NASA/JPL-Caltech/SwRI/MSSS. Picture processing: Gerald Eichstädt/Thomas Thomopoulos (CC BY))

“Io is just affected by volcanoes, and we caught just a few of them in motion,” Scott Bolton, Juno’s principal investigator, stated in a NASA statement on Thursday (April 18).

“We additionally acquired some nice close-ups and different information on a 200-kilometer-long (127-mile-long) lava lake referred to as Loki Patera,” Bolton added. “There may be wonderful element exhibiting these loopy islands embedded in the midst of a doubtlessly magma lake rimmed with scorching lava. The specular reflection our devices recorded of the lake suggests components of Io’s floor are as clean as glass, paying homage to volcanically created obsidian glass on Earth.”

Juno got here inside about 930 miles (1,500 kilometers) of Io’s roiling floor in the course of the two flybys, which occurred in December 2023 and February 2024. Mission workforce members processed the encounter information right into a flyover animation, which offers a stunning view of the moon.

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Maps created with Juno information just lately even have proven that Io’s floor is smoother than these of the opposite Galilean moons, and that Io’s poles are colder than its mid-latitude areas, mission workforce members stated.

Jupiter, too

Juno has additionally collected intriguing details about the poles of Jupiter just lately utilizing its Microwave Radiometer (MWR) instrument, together with variations among the many fuel large’s intriguing north polar cyclones.

“Maybe [the] most hanging instance of this disparity will be discovered with the central cyclone at Jupiter’s north pole,” Steve Levin, Juno’s mission scientist at NASA’s Jet Propulsion Laboratory in Southern California, stated in the identical assertion. 

“It’s clearly seen in each infrared and visual mild pictures, however its microwave signature is nowhere close to as robust as different close by storms,” Levin added. “This tells us that its subsurface construction should be very completely different from these different cyclones.”

The Juno workforce can be studying extra about Jupiter’s water abundance. The scientists aren’t in search of flowing lakes and rivers — Jupiter has no discernible floor, in spite of everything — however somewhat for oxygen and hydrogen molecules in its thick ambiance. Such work follows on from that executed by NASA’s Galileo Jupiter orbiter, which ended its mission with an intentional demise dive into Jupiter’s ambiance in 1995.

Galileo “did wonderful science, however its information was to this point afield from our fashions of Jupiter’s water abundance that we thought-about whether or not the placement it sampled might be an outlier. However earlier than Juno, we could not affirm,” Bolton stated. “Now, with current outcomes made with MWR information, we have now nailed down that the water abundance close to Jupiter’s equator is roughly three to 4 instances the photo voltaic abundance when in comparison with hydrogen. This definitively demonstrates that the Galileo probe’s entry web site was an anomalously dry, desert-like area.”

Whereas there are nonetheless many questions surrounding how Jupiter fashioned, scientists proceed to depend on information coming in from Juno’s prolonged mission. The probe’s subsequent shut flyby of Jupiter — its 61st general — shall be on Might 12.



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