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A montage of Jupiter and its four largest moons (distance and sizes not to scale) There are 95 moons of Jupiter with confirmed orbits as of 5 February 2024.
The table below lists the moons of Jupiter in increasing order of distance from Jupiter. The table also lists the name of each moon, the year it was discovered, its distance from Jupiter, its orbital period, and its radius.
Jupiter has between 80 and 95 moons, but neither number captures the complexity of the Jovian system of moons, rings, and asteroids.
Fluctuations in the orbits of the moons indicate that their mean density decreases with distance from Jupiter. Callisto, the outermost and least dense of the four, has a density intermediate between ice and rock whereas Io, the innermost and densest moon, has a density intermediate between rock and iron.
All Moons of Jupiter. Most of Jupiter's swarms of smaller moons orbit much farther out than the Galilean satellites. Of these distant moons, the larger ones may be captured asteroids. The smaller ones are likely fragments from massive collisions.
Most of Jupiter's moons are small, with about 60 of the satellites measuring less than 6.2 miles (10 kilometers) in diameter. Unusually, the outer moons orbit in the opposite direction to...
Jupiter has four large moons which were discovered by Galileo in 1610 using a 20-power telescope. These moons are known as the Galilean moons and they are called Io, Europa, Ganymede and Callisto. Jupiter also has dozens of other smaller moons that are thought to have originated from passing asteroids.
Metis is the closest moon to Jupiter at a distance of 128,000 km. It is roughly 40 km in diameter, tidally-locked, and highly-asymmetrical in shape (with one of the diameters being almost twice...
Galilean Moons of JupiterThe planet Jupiter’s four largest moons, or satellites, are called the Galilean moons, after Italian astronomer Galileo Galilei, ho observed them in 1610. The German astronomer Simon Marius apparently discovered.
Metis is the closest moon to Jupiter at a distance of 128,000 km. It is roughly 40 km in diameter, tidally-locked, and highly-asymmetrical in shape (with one of the diameters being almost...