A new analysis of the navigational data from NASA’s Cassini space probe allowed to obtain new information about the ocean of liquid water beneath the surface of Enceladus, one of Saturn’s moons. This research, coordinated by Luciano Iess of the department of mechanical and aerospace engineering at Rome’s University La Sapienza, was carried out by a team of Italian and American researchers exploiting the influences of the very small gravitational changes on Cassini’s movements.