Ring Herding

SATURN DAILY

Ring Herding

Prometheus does it stuff to Ring F about Saturn.

by Staff Writers
Pasadena CA (JPL) Jul 11, 2007
Prometheus pulls material from the tortured F ring in this highly detailed view. The aftereffects of the moon's other recent encounters with the ring are visible above as dark channels in the inner ringlet. One of two F ring shepherd moons, Prometheus is 102 kilometers (63 miles) across.

This view looks toward the unilluminated side of the rings from about seven degrees above the ringplane.

The image was taken in visible light with the Cassini spacecraft narrow-angle camera on June 1, 2007 at a distance of approximately 2.1 million kilometers (1.3 million miles) from Prometheus. Image scale is 12 kilometers (8 miles) per pixel.

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SATURN DAILY

Cassini Scientists Wring Out The Details On Spongy Hyperion

Boulder CO (SPX) Jul 10, 2007
Scientists on NASA's Cassini mission to Saturn now have a better understanding of why the odd moon Hyperion has such an unusual appearance. The crucial factor in creating the strange, sponge-like appearance of Hyperion appears to be its extremely low density, say Cassini scientists in a research paper being published in the July 5 issue of the journal Nature. The researchers examined Cassini spacecraft images and other data on the moon's mass acquired during encounters with Hyperion over the past three years.

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