Even by the standards of Io, the most volcanic celestial body in the solar system, recent events observed on the Jovian moon are extreme. Scientists with NASA's Juno mission have discovered a ...

Valves used in the spacecraft's fuel system seem to be malfunctioning, preventing mission controllers from moving Juno into a lower orbit that would allow them to gather science more quickly.

NASA's Juno to Enter Jupiter's Orbit After a final 35-minute engine burst to slow it down Monday night, the NASA explorer spacecraft named Juno will attempt to enter Jupiter's polar orbit.