Jupiter’s Galilean Moon System
Learn About Jupiter's Galilean Moons + 65 Others!
Jupiter has the at least 69 moons, the second most of any planet in the solar system after Saturn. Eight are regular satellites with prograde and nearly circular orbits, the closest four moons are relatively small and contribute to Jupiter’s ring system. The four large Galilean moons, which Galileo Galilei discovered in 1610, were named after the lovers of the Roman god Jupiter and are among the most massive moons in the solar system and make up 99.997% of Jupiter’s moon system! The remainder 61 moons are irregular satellites whose prograde, retrograde and eccentric orbits are likely captured asteroids.
Europa is one of the smoothest and most reflective objects in the solar system on account of its young icy surface which may harbour a global ocean of saltwater and which may inhabit alien life! Learn more here >>
Amathea is one of the inner moons and resembles what you might think an asteroid would look like. Read about this interesting little moon which is dwarfed by its giant Galilean neighbours! Learn more here >>
There have been 65 irregularly shaped small moons that orbit in three regions around Jupiter with quite different origins and histories depending on their locations, but relatively little is known about them as only the 4 small inner moons have been imaged studied by spacecraft. Learn more here >>