+ Related animation + View video (Quicktime 1 Mb) NASA's Cassini
spacecraft images of Saturn's rings show a bright arc looping
around the inside edge of the G ring. Other images show material
in the E ring that originated from geysers on the moon
Enceladus. The full story is available from the Space Science
Institute: http://ciclops.org/view.php?id=2096 This movie shows
a bright arc of material flashing around the edge of Saturn's G
ring, a tenuous ring outside the main ring system. The arc is
the same feature identified in images of the G ring taken in May
2005 (see PIA07718 ). Scientists have seen the arc a handful of
times over the past year, and it always appears to be a few
times brighter than the rest of the ring and very tightly
confined to a narrow strip along the inside edge of the G ring.
Imaging team members believe that this feature is long-lived and
may be held together by resonant interactions with the moon
Mimas of the type that corral similar ring arcs around Neptune.
The movie consists of 15