Juno
Latest about Juno
![An image shows Io and the Juno spacecraft with a top down view of its south pole and the solar system's biggest record volcanic eruption](https://cdn.mos.cms.futurecdn.net/mPJ9ZdUNo47A2jJYJgouSo-320-80.png)
NASA's Juno spacecraft watches most powerful volcanic event ever seen on Jupiter's moon Io
By Robert Lea published
NASA's Juno spacecraft has spotted the most powerful volcanic eruption ever seen on the solar system's most volcanic body, the Jovian moon Io.
![a yellowish moon dotted with craters, with an inset image showing a gas plume escaping its surface](https://cdn.mos.cms.futurecdn.net/rCbCvGTxMcVfea6JBBNUdC-320-80.jpg)
What causes volcanic eruptions on Jupiter's moon Io? Scientists aren't so sure anymore
By Keith Cooper published
New measurements from NASA's Juno probe have seemingly put to bed the possibility of a magma ocean beneath the surface of Io.
![A view of Jupiter's moon Europa captured by NASA's Juno mission during its Sept. 29 close flyby at the moon. The spacecraft was 945 miles (1,500 kilometers) above the moon's surface when the image was taken.](https://cdn.mos.cms.futurecdn.net/ShUgGBDmkArFBD4JzzeUy6-320-80.jpg)
Jupiter's ocean moon Europa may have less oxygen than we thought
By Monisha Ravisetti published
NASA's Juno spacecraft helped scientists make the first direct measurement of molecular oxygen around Jupiter's moon Europa. The result is lower than some previous estimates.
![a yellowish moon dotted with craters, with an inset image showing a gas plume escaping its surface](https://cdn.mos.cms.futurecdn.net/rCbCvGTxMcVfea6JBBNUdC-320-80.jpg)
NASA's Juno probe sees active volcanic eruptions on Jupiter's volcanic moon Io (images)
By Robert Lea published
NASA's Juno spacecraft has seen Jupiter's volcanic moon Io like never before, catching active eruptions, lava flows, and a side to the solar system's most volcanic body not seen in 35 years.
![a pale brown-green planet is half shaded in the black of space.](https://cdn.mos.cms.futurecdn.net/TJ4rU58EWBzmKNbwrw3XeR-320-80.jpg)
Jupiter's volcanic moon Io looks outstanding in these close flyby photos from NASA's Juno probe
By Rahul Rao published
During its second close rendezvous with Jupiter's volcanic moon, NASA's Juno spacecraft collected some amazing images of the scene.
![A stunning image of the volcanic moon Io as seen by Juno on Dec. 30, 2023](https://cdn.mos.cms.futurecdn.net/6ydiDBU3zVrCSsn73fEoYH-320-80.png)
NASA Juno spacecraft reveals Jupiter's volcanic moon Io like never before in spectacular new images
By Robert Lea published
On Dec. 30, 2023, NASA's Juno spacecraft came closer to the volcanic moon Io than any other mission has in 20 years. In the process, Juno was able to grab some incredible images.
![a gray moon pockmarked with craters](https://cdn.mos.cms.futurecdn.net/kfbdfwoy7m5jNTp7KoHM29-320-80.jpg)
NASA's Juno probe detects organic compounds on huge Jupiter moon Ganymede
By Brett Tingley published
NASA's Juno spacecraft detected organic compounds and mineral salts on the surface of Jupiter's largest moon, Ganymede, hinting at a salty subsurface ocean.
![photo of swirling clouds in jupiter's atmosphere that looks like an eerie, elongated face.](https://cdn.mos.cms.futurecdn.net/8TMLEavSkYbRaqsPmvK5Ah-320-80.jpg)
Jupiter has a creepy 'face' in haunting Halloween photo by NASA's Juno probe
By Samantha Mathewson published
NASA's Juno mission captured a new image of Jupiter's far northern region, where the swirling cloud tops and turbulent storms resemble an eerie, elongated face.
Get the Space.com Newsletter
Breaking space news, the latest updates on rocket launches, skywatching events and more!