Prometheus (moon)
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Prometheus is an inner satellite of Saturn. It was discovered on 24 October 1980 from images taken by the Voyager 1 probe, and was provisionally designated S/1980 S 27. In late 1985 it was officially
Prometheus image from Cassini (December 26, 2009)
Prometheus pulling material from the F Ring
Prometheus tugging kinks into the F Ring
Cassini image (with moon's Saturn-facing end at lower right) reveals a surface covered with a blanket of fine material.
Janus (moon)
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Janus is an inner satellite of Saturn. It is named after the mythological Janus, the Roman god of beginnings. This natural satellite was first identified by Audouin Dollfus on December 15, 1966, altho
Prometheus (moon)
…approximately 137 km × 81 km × 56 km (85 mi × 50 mi × 35 mi). The surface is heavily cratered, giving it a similar appearance to nearby Epimetheus and Janus. It has several ridges and valleys and a number of impact craters of about 20 km (12 mi) diameter are visible. From its very low density and relatively…
Janus as imaged by Cassini on 7 April 2010: highest-resolution full-disk image to date
Epimetheus (lower left) and Janus (right) seen on 20 March 2006, two months after swapping orbits. The two moons appear close only because of foreshortening; in reality, Janus is about 40,000 km farther from Cassini than Epimetheus.
Janus as viewed by Voyager 2 (1981-08-25).
Janus and Prometheus lie above and below Saturn's rings (2006-04-29).