Jupiter, the largest planet in our solar system, has a total of 79 known moons These moons vary in size, with the four largest moons known as the Galilean moons: Io, Europa, Ganymede, and Callisto. These four moons were discovered by the astronomer Galileo Galilei in 1610 and are among the most fascinating objects in the solar system. However, please note that new moons could be discovered in the future as technology and observations improve.