NASA's Juno spacecraft spots gigantic volcanic eruptions on Jupiter's moon

Washington, Jan 3: NASA's solar-powered Juno spacecraft has beamed back new images of volcanic plume on Jupiter's moon Io, captured during the mission's 17th flyby of the gas giant.

On Dec. 21, during winter solstice, four of Juno's cameras captured images of the Jovian moon Io, the most volcanic body in our solar system, on the mission's 17th flyby of the gas giant.

The images show the moon half-illuminated with a bright spot seen just beyond the terminator, the day-night boundary.

After Io had passed into the darkness of total eclipse behind Jupiter, sunlight reflecting off nearby moon Europa helped to illuminate Io and its plume. SRU images released by SwRI depict Io softly illuminated by moonlight from Europa.

The brightest feature on Io in the image is thought to be a penetrating radiation signature, a reminder of this satellite's role in feeding Jupiter's radiation belts, while other features show the glow of activity from several volcanoes. The images can lead to new insights into the gas giant's interactions with its five moons, causing phenomena such as Io's volcanic activity or freezing of the moon's atmosphere during eclipse, added Bolton.

Io's volcanoes were discovered by NASA's Voyager spacecraft in 1979. Io's gravitational interaction with Jupiter drives the moon's volcanoes, which emit umbrella-like plumes of SO2 gas and produce extensive basaltic lava fields. The recent Io images were captured at the halfway point of the mission, which is scheduled to complete a map of Jupiter in July 2021.

Launched in 2011, Juno arrived at Jupiter in 2016. The spacecraft orbits Jupiter every 53 days, studying its auroras, atmosphere and magnetosphere. The solar-powered Juno features eight scientific instruments designed to study Jupiter's interior structure, atmosphere and magnetosphere.

(with PTI inputs)