Jupiter’s moon Io is a world of active volcanoes. It’s the most volcanically active world in our solar system. Hundreds of volcanoes dot Io’s surface, some spewing lava dozens of miles into the moon’s thin sulfur dioxide atmosphere. The dramatic infrared image above is from the Juno spacecraft, which has been in orbit around Jupiter since July 2016. The craft’s Jovian Infrared Auroral Mapper (JIRAM) captured Io in infrared, seen here as processed by Roman Tkachenko (@_RomanTkachenko on Twitter), an amateur astronomer and music producer in Kursk, Russia, and one of many citizen scientists who contribute to the Juno mission by processing the spacecraft’s images.
Tkachenko also annotated the image, as shown below:
Bottom line: The Juno spacecraft, now orbiting Jupiter, acquired this infrared image of the giant planet’s moon Io. Each fiery dot is an active volcano.
Deborah Byrd created the EarthSky radio series in 1991 and founded EarthSky.org in 1994. Today, she serves as Editor-in-Chief of this website. She has won a galaxy of awards from the broadcasting and science communities, including having an asteroid named 3505 Byrd in her honor. A science communicator and educator since 1976, Byrd believes in science as a force for good in the world and a vital tool for the 21st century. "Being an EarthSky editor is like hosting a big global party for cool nature-lovers," she says.