By Ajith Mathew
Ganymede in diameter is 5262 kilometers Ganymede is also the largest Galilean moon that orbits Jupiter it takes 172 hours.
Callisto orbits jupiter Orbit takes about 17 days it gravity is 1.236m/s2 Callisto diameter is 4806 Kilometer
Europa orbits the Jupiter, it orbital period is 85 hours. It is the smallest of its moons it has a mass of 1.315m/s2.
lo is the fourth largest moon in the solar system with a diameter of 3,642 kilometer its orbital time is 42 hours.