Slightly larger than Earth's moon, Io is the fourth-largest moon in the Solar System, has the highest density of any moon, the strongest surface gravity of any moon, and the lowest amount of water by atomic ratio of any known astronomical object in the Solar System.

MooMoo.io is a brand new Survival IO Game. Build and Survive with your friends.

Facts about Io. Io has more than 400 active volcanoes on its surface. They make this little moon the most actively volcanic world in the solar system. The volcanism on Io is due to tidal heating, as the moon is stretched by Jupiter’s strong gravitational pull and by the lesser gravitational effects of the other satellites.

Io is the innermost of Jupiter’s four largest moons, which are also known as the Galilean moons (Europa, Ganymede, and Callisto are the remaining three). Because it’s the closest moon to its massive host planet, Io feels a strong gravitational pull as it orbits Jupiter.

2 days ago · (B) Io's eccentric orbit. Io's shape changes as it completes its orbit. (C) Earth's moon's orbit is actually more eccentric than Io's, but Earth's gravity is much weaker than Jupiter's, so Earth's moon does not experience as much deformation. (Lsuanli – Own work/CC BY-SA 3.0) The heat is enough to melt the moon's interior into molten rock.

Jan 2, 2024 · Passing within around 930 miles (1,500 kilometers) of Io, the most volcanic body in the solar system, on Saturday, Dec. 30, 2023, Juno was able to capture stunningly detailed images of the Jovian...

5 days ago · During its extended mission, Juno’s trajectory passes by Io every other orbit, flying over the same part of the moon each time. Previously, the spacecraft made close flybys of Io in December 2023 and February 2024, getting within about 930 miles (1,500 kilometers) of its surface.The latest flyby took place on Dec. 27, 2024, bringing the spacecraft within about 46,200 miles (74,400 kilometers ...

Io is a moon of the planet Jupiter. It is Jupiter's third biggest moon with a diameter of 3642 km, slightly bigger than Earth 's moon. Io has about 400 active volcanos. It is the most volcanically active body in the Solar System.

Io is the fifth moon of Jupiter and the fourth largest moon in the solar system. It is the innermost of the Galilean moons that orbit Jupiter. Io is the most volcanically active body in the solar system, spewing out sulphur as high as 300 km (190 miles) in the air.

4 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.