Cassini Observes the Active South Pole of Enceladus

Details Cassini Observes the Active South Pole of Enceladus Cassini Observes the Active South Pole of Enceladus

Mar 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sci...311.1393p&link_type=abstract

Science, Volume 311, Issue 5766, pp. 1393-1401 (2006).

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Scientific paper

Cassini has identified a geologically active province at the south pole of Saturn's moon Enceladus. In images acquired by the Imaging Science Subsystem (ISS), this region is circumscribed by a chain of folded ridges and troughs at ~55°S latitude. The terrain southward of this boundary is distinguished by its albedo and color contrasts, elevated temperatures, extreme geologic youth, and narrow tectonic rifts that exhibit coarse-grained ice and coincide with the hottest temperatures measured in the region. Jets of fine icy particles that supply Saturn's E ring emanate from this province, carried aloft by water vapor probably venting from subsurface reservoirs of liquid water. The shape of Enceladus suggests a possible intense heating epoch in the past by capture into a 1:4 secondary spin/orbit resonance.

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