Io orbits Jupiter at a distance of 421,700 km (262,000 mi) from Jupiter's center and 350,000 km (217,000 mi) from its cloudtops. It is the innermost of the Galilean satellites of Jupiter, its orbit lying between those of Thebe and Europa. Including Jupiter's inner satellites, Io is the fifth moon out from Jupiter.

5 days ago · Jupiter’s moon Io is the most volcanically active world in the solar system, with hundreds of volcanoes, some erupting lava fountains dozens of miles (or kilometers) high. Io is caught in a tug-of-war between Jupiter’s massive gravity and the smaller but precisely timed pulls from two neighboring moons that orbit farther from Jupiter ...

Oct 26, 2024 · Jupiter’s rocky moon Io is the most volcanically active world in the solar system, with hundreds of volcanoes, some erupting lava fountains dozens of miles (or kilometers) high. Io’s remarkable activity is the result of a tug-of-war between Jupiter’s powerful gravity and smaller but precisely timed pulls from two neighboring moons that ...

6 days ago · The source of Io’s torment: Jupiter. About the size of Earth’s Moon, Io is extremely close to the mammoth gas giant, and its elliptical orbit whips it around Jupiter once every 42.5 hours. As the distance varies, so does the planet’s gravitational pull, which leads to the moon being relentlessly squeezed.

Io is the innermost and third-largest of Jupiter’s four Galilean moons. Io is covered in hundreds of volcanoes. It is the most volcanically active world in the Solar System. Io can help us understand volcanism and tidal heating throughout the Solar System.

Nov 4, 2024 · Io: Exploration. Most of what we know about Io comes from Galileo spacecraft, which made a detailed study of the Jupiter system—including Io—from orbit from December 1995 to September 2006, but it was Voyager 1 that spotted the first signs of the little moon’s powerful volcanism in 1979.

Oct 26, 2022 · Io — Jupiter's fifth moon — is the most volcanically active body in the solar system. Io's surface is peppered with hundreds of volcanoes, some spewing sulfurous plumes hundreds of miles high.

Dec 14, 2024 · 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...

5 days ago · Io, innermost of the four large moons (Galilean satellites) discovered around Jupiter by the Italian astronomer Galileo in 1610. It is the most volcanically active body in the solar system. As many as 300 volcanoes may be active on the satellite at a given time.

Io is one of the four Galilean moons of planet Jupiter. It is the hottest moon in the solar system, recording up to 2,600°F around its 400 volcanoes, hotter than Earth's volcanoes. Due to its proximity to Jupiter, it receives 3,600 rem of radiation a …