NASA's Juno spacecraft captures volcanic plume on Jupiter's moon

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Representational Image
Representational Image

New Delhi : Scientists from NASA confirms that its solar probe has sent back new images of volcanic plume on Jupiter's moon Io, captured during the mission's 17th flyby of the gas giant.

It was on December 21 that the four of Juno's cameras captured images of the Jovian moon Io, the most volcanic body in our solar system.

NASA Juno camera, the Stellar Reference Unit (SRU), the Jovian Infrared Auroral Mapper (JIRAM) and the Ultraviolet Imaging Spectrograph (UVS) observed Io for over an hour,  providing a glimpse of the moon's polar regions as well as evidence of an active eruption.

“We knew we were breaking new ground with a multi-spectral campaign to view Io's polar region, but no one expected we would get so lucky as to see an active volcanic plume shooting material off the moon's surface,” said Scott Bolton, main investigator of the Juno mission.

“This is quite a New Year's present showing us that Juno has the ability to clearly see plumes,” said Bolton, associate vice president of Southwest Research Institute's Space Science and Engineering Division.

“The ground is already in shadow, but the height of the plume allows it to reflect sunlight, much like the way mountaintops or clouds on the Earth continue to be lit after the sun has set,” said Candice Hansen-Koharcheck, the JunoCam lead from the Planetary Science Institute.

After moon lo had passed into the darkness of total eclipse behind Jupiter, sunlight reflecting off nearby moon Europa helped to illuminate Io and its plume. The images released by SwRI indicate 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.

To inform, the volcanoes in Io 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 new Jupiter's moon 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 spacecraft arrived at Jupiter in 2016. The probe orbits Jupiter every 53 days, studying its auroras, atmosphere and magnetosphere. It is solar-powered featured with scientific instruments to study the interior structure, atmosphere and magnetosphere of the Jupiter.