Even if a magma ocean is confirmed, “there are still a lot of uncertainties associated with trying to understand Io’s interior structure,” Tuttle Keane says.

S cott Bolton’s first encounter with Io took place in the summer of 1980, right after he graduated from college and started a job at NASA. The Voyager 1 spacecraft had flown past this moon of Jupiter, ...

Jupiter's volcanic moon Io doesn't appear to have a subsurface ocean of magma, resolving some issues about how Io's volcanoes erupt and raising broader questions about similar magma oceans within ...

“We’ve never really understood where in Io’s interior the mantle is melting, how that mantle melt is getting to the surface,” de Kleer said. Our own moon shows evidence of primeval tidal ...

Observations made of Jupiter’s moon Io during the Juno mission’s flybys helped astronomers confirm how and why Io became the most volcanic world in the solar system.

The team turned to data from two close flybys of Io from NASA’s Juno spacecraft from December 2023 and February 2024. As the spacecraft approached within 930 miles of the moon, scientists used ...

Though the surface of the moon is cold, at below minus 200 degrees Fahrenheit (minus 130 degrees Celsius), the volcanoes spewing out material from the planet’s hot interior can reach ...

NASA's robotic Juno spacecraft is delivering the fresh data on Io with a series of flybys, each getting closer to Jupiter's volcanic moon until a pair of close-up encounters at a range of less ...

Io does not have a shallow global magma ocean beneath its surface, counter to previous claims, suggests a paper published in Nature. Observations from NASA's Juno spacecraft, combined with all ...

Scientists can say two things with certainty about Io. First, this moon of Jupiter is the most volcanic object in the known universe. Its surface is festooned with so many lava-spewing calderas ...

Sometimes, scientists’ only option is to get creative. Io’s famous volcanoes (more than 400 of them) blast sulfur dioxide gas from deep in the moon’s interior high into its yellowish-brown ...