Saturn’s Hydrogen Aurora, WFPC2 Imaging from the Hubble Space Telescopel

WFPC2/HST images of Saturn’s far-ultraviolet aurora reveal emissions confined to a nar-row band of latitudes near Saturn’s north and south poles. The aurorae are most prominent in the morning sector with patterns that appear fixed in local time. The geographic dis-tribution and vertical extent of the auroral emissions seen in these images provide the first new observational insights into the physical mechanisms that power Saturn’s aurora since the Voyager encounters seventeen years ago