The predawn hours of Aug. 8 present a perfect opportunity to see Jupiter's four largest moons line up next to the "King of the Planets" as it voyages through the stars of the constellation Gemini.

Because Io is so close to its massive host planet, the moon is subjected to a tremendous gravitational pull as it orbits Jupiter once about every 42 hours, according to the Planetary Society.

Jupiter moon of Io is famed for its volcanoes. NASA just spotted the most powerful one yet Not only was the hot spot larger than Earth’s Lake Superior, but it also was seen belching out ...

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 ...

Flybys of Jupiter’s fiery moon Io, carried out by NASA’s Juno spacecraft, are helping to solve the enduring mystery of why the small moon is the most volcanically active body in our solar ...

Because Io is so close to its massive host planet, the moon is subjected to a tremendous gravitational pull as it orbits Jupiter once about every 42 hours, according to the Planetary Society.

The new pictures of Io are, in fact, so intricate that scientists could discern overlapping deposits of lava spewed by two active volcanoes just south of the moon's equator. An LBT image of Io ...

But West Coast observers should be able to see both shadows until Io’s shadow transit completes at 6:54 a.m. EST. To spot these Jupiter phenomena, a telescope is your best option.

The north polar region of Jupiter’s volcanic moon Io was captured by NASA’s Juno during the spacecraft’s 57th close pass of the gas giant on Dec. 30, 2023. Data from recent flybys is helping ...

Lava lakes on Io's surface had previously been found in a few locations, such as the 127-mile-long lake Loki Patera. This study reveals that these lakes are extremely common on the moon, and the ...

As many as 400 volcanoes are erupting on the surface of Jupiter's innermost moon Io, with virtually every square inch of the moon covered in lava plains. The erupting lava (molten rock that ...