Uranusí rings

Uranusí rings

. This Voyager 2 image, taken on 23 January 1986, shows five of the nine rings of Uranus that had been previously inferred from Earth-based observations of their brief occultation of a starís light. In this view, sunlight striking the rings particles was reflected back toward the camera, showing that the dense parts of the ring system consist of narrow rings with wide gaps. In contrast, Saturnís main rings are broad with narrow gaps. From bottom to top, the rings are designated by the Greek letters alpha, beta, eta, gamma and delta. (Courtesy of NASA and JPL.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University