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DescriptionIo, or Jupiter I, is the innermost and third-largest of the four Galilean moons of the planet Jupiter. Slightly larger than Earth’s moon, Io is the fourth-largest moon in the Solar System, has the highest density of any moon, and has the lowest amount of water of any known astronomical object in the Solar System. Wikipedia
Orbital period: 42 hours
Radius: 1,131.9 mi
Gravity: 1.796 m/s²
Discovered: January 8, 1610
Mar 13, 2019 — The moon Io is the most volcanically active world in the solar system. Io even has lakes of molten silicate lava on its surface. 5. Only Wisps.
Aug 13, 2018 — Jupiter's fifth moon, Io, is the most volcanically active body in the solar system. Plumes of sulfur spew upward as high as 190 miles (300 ...
Jupiter's moon Io [EYE-oh or EE-oh] is one of the most exotic places in the solar system. It is the most volcanic body known, with lava flows, lava lakes, ...