Jupiter, the largest planet in our solar system, has over 79 known moons. Four of these moons—Io, Europa, Ganymede, and Callisto—are known as the Galilean moons, discovered by Galileo in 1610. Each moon has unique features, including volcanic activity on Io, the icy surface of Europa, and the massive size of Ganymede, the largest moon in the solar system.
Europa, in particular, has captured the attention of scientists because it is believed to have a subsurface ocean beneath its icy crust, making it one of the most promising places to search for signs of extraterrestrial life. These moons are an essential area of study in planetary exploration.