Io orbits close to Jupiter at an average distance of 262,000 miles (422,000 km), completing its elliptical cycle once every 42.5 hours. Due to the shape of its orbit, the moon's d ...

Thanks to data collected by the Juno probe last winter, researchers at NASA's Jet Propulsion Laboratory (JPL) have learned ...

The winter stars are like that. They're bright, sparkly and arrive "from a distance" low on the eastern horizon and gradually ...

German astronomer Simon Marius is best remembered for his disputes with Galileo Galilei over priority for discovering Jupiter ...

Io's volcanic activity explained without magma ocean evidence Tidal heating powers volcanic eruptions on Jupiter's moon ...

NASA's recent flybys of Io, however, reveal that it likely doesn't contain a global magma ocean beneath its surface, as ...

Observations made of Jupiter’s moon Io during the Juno mission’s flybys helped astronomers confirm how and why Io became the ...

Scientists with NASA's Juno mission to Jupiter have discovered that the volcanoes on Jupiter's moon Io are each likely powered by their own chamber of roiling hot magma rather than an ocean of magma.

A Cold Moon hangs in the sky while Jupiter still shines bright and the Geminid meteor shower peaks in the sky this week.

As many as 400 volcanoes are erupting on the surface of Jupiter's innermost moon Io, with virtually every square inch of the ...