Images of Saturn taken by the Cassini spacecraft's wide-angle camera in September, with the Sun directly behind the planet, have revealed the existence of two new rings around the planet and have confirmed the presence of two other suspected rings, NASA announced on11 October. Two of the rings are associated with, and share the orbits of, one or more Saturn moonlets, and scientists expect to find a moonlet in at least one of the other two rings. Because the moonlets are so small, their gravity is too weak to retain material on their surfaces when struck by meteoroids, and this material creates diffuse rings along theirpaths.