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Jupiter is the largest planet in the solar system and has, as of 2023, 95 known moons. The four largest moons of Jupiter—Io, Callisto, Ganymede, and Europa—were the first objects in the solar system discovered with a telescope. Galileo discovered them in 1610, and they are now called the Galilean.
All together, Jupiter's moons form a satellite system called the Jovian system. The most massive of the moons are the four Galilean moons: Io, Europa, Ganymede, and Callisto, which were independently discovered in 1610 by Galileo Galilei and Simon Marius and were the first objects found to orbit a body that was neither Earth nor the Sun.
There are 95 known moons of Jupiter, as of 1 November 2023. Jupiter has the second largest number of moons of any planet in the Solar System. The most massive of the moons are the four Galilean moons, which were independently discovered in 1610 by Galileo Galilei and Simon Marius.
Jupiter has 95 moons that have been officially recognized by the International Astronomical Union. But the number doesn't capture the complexity of the Jovian system of moons, rings and asteroids. The giant planet has thousands of small objects in its orbit.
Jun 8, 2023 · Explore Jupiter's 92 moons including the infamous Galilean satellites and the largest moon in the solar system, Ganymede.
Aug 21, 2023 · 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.
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.
