Get ready for a celestial spectacle as NASA’s Juno spacecraft prepares for an unprecedented encounter with Jupiter’s fiery moon, Io, on Saturday, December 30. This close encounter, just 1,500 kilometers from Io’s turbulent surface, marks the Space Shuttle’s closest trip to the Moon in more than two decades, and promises a wealth of groundbreaking data.
Juno’s principal investigator is Scott Bolton of the Southwest Research Institute in San Antonio, Texas, who predicted many insights into Io’s volcanic dynamics. “By combining data from this flyby with our previous observations, the Juno science team investigated the differences in Io’s volcanoes,” Bolton explained. The team’s goal is to unravel the mysteries of Io’s eruptions – their frequency, intensity, fluidity of lava flows and their relationship to the charged particles of Jupiter’s magnetosphere.
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This daring flyby is just the first leg, and a very close second encounter is scheduled for February 3, 2024, when Juno will again come within 1,500 kilometers of Io’s surface. The spacecraft closely monitored Io’s volcanic activity from a wide range, providing unprecedented views of the Moon’s poles and making close flybys of Jupiter’s other moons, Ganymede and Europa.
“During our close flybys in December and February, Juno will investigate the source of massive volcanic activity on Io, whether there is a magma ocean beneath its crust, and the importance of Jupiter’s tidal forces relentlessly pressing on this tormented moon,” Bolton said. .
As Juno enters the third year of its extended mission, it seeks to uncover the secrets of Jupiter’s origins. This probe will not only study Io, but also explore the ring system that houses several of Jupiter’s inner moons. During the Io flyby, Juno’s three cameras will be in action:
1. Jupiter Infrared Aurora Mapper (JIRAM): Collects heat signatures from volcanoes and calderas on Io.
2. Stellar Reference Unit: Captured the highest resolution image of Io’s surface to date.
3. JunoCam Imager: Provides color images in visible light.
The December 30 flyby marks Juno’s 57th orbit around Jupiter, during which the spacecraft and its rugged camera will endure one of the harshest radiation environments in the solar system. Specifically, NASA estimates that Io’s gravitational pull will change Juno’s orbit, shortening it from 38 to 35 days after this flyby. With another close encounter set to occur in February, Juno’s orbit will shrink further to an impressive 33 days. The cosmos is ready to reveal its secrets, orbit by orbit.
2023-12-30 17:32:35
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