Adding a "JUPITER MODE" to the virtual activity would change the results of Galileo's experiment because the gravitational force between two objects depends on their masses and the distance between them. Since Jupiter is 11 times more massive than Earth, it exerts a much stronger gravitational force on its moons than Earth does. Therefore, the moons of Jupiter would move at different rates than the moons of Earth in Galileo's experiment. The "JUPITER MODE" would need to account for the difference in gravitational force and adjust the simulation accordingly to accurately represent the motion of Jupiter's moons.