Jupiter’s Volcanic Moon Io | NASA's Juno Mission [Alert: Budget Cancelation]

Jupiter’s Volcanic Moon Io | NASA's Juno Mission [Alert: Budget Cancelation]

During its close flyby of Jupiter’s moon Io on December 30, 2023, NASA’s Juno spacecraft captured some of the most detailed imagery ever of Io’s volcanic surface. In this image, taken by the JunoCam instrument from about 930 miles (1,500 kilometers) above the moon, Io’s night side [left lobe] is illuminated by “Jupitershine,” which is sunlight reflected from the planet’s surface.

This image is the NASA Science Image of the Month for October 2025.

NASA's highly successful Juno Mission is being canceled in NASA's Fiscal Year 2026 Budget Request, along with 18 other active science missions. NASA's science budget is being reduced by nearly 50%. NASA's total budget will become the lowest since 1961, after accounting for inflation.

Contact your representatives in the United States Congress, House and Senate, to express your concerns about severe budget cuts at NASA:

https://www.usa.gov/elected-officials/

NASA's Fiscal Year 2026 Budget Request (PDF): https://www.nasa.gov/fy-2026-budget-request/

Image Description: Jupiter's moon, Io, as seen by NASA's Juno spacecraft. Io is yellow-brown and looks somewhat like a potato. It has geographical features look like the eyes on a potato. Io is partly illuminated by sunshine reflecting off of Jupiter's surface. The darkness of space provides a black background.

More information about Juno is available at:
https://science.nasa.gov/mission/juno

https://www.missionjuno.swri.edu

Image Credit: NASA/JPL–Caltech/Southwest Research Institute (SwRI)/Malin Space Science Systems (MSSS)
Image processing: Emma Wälimäki
Text credit: NASA/JPL–Caltech/Southwest Research Institute (SwRI)/Malin Space Science Systems (MSSS)
Release Date: Sept. 30, 2025

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