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The Far-Ultraviolet Oxygen Airglow of Europa and Ganymede
Far-UV spectra of Europa and Ganymede, acquired by the Hubble Space Telescope Goddard High Resolution Spectrograph, indicate that, in addition to faintly reflected sunlight, both satellites emit O I
Detection of an oxygen atmosphere on Jupiter's moon Europa
The detection of atomic oxygen emission from Europa is reported, which is interpreted as being produced by the simultaneous dissociation and excitation of atmospheric O2 by electrons from Jupiter's magnetosphere.
Detection of the hydroxyl radical in the Saturn magnetosphere
THE magnetosphere in the vicinity of the orbits of Saturn's icy satellites consists of a low-density plasma, in which the electrons are an order of magnitude cooler than the accompanying heavy ions1.
The distribution of atomic hydrogen in the magnetosphere of Saturn
Three sets of previously unpublished Voyager ultraviolet spectrometer (UVS) observations in H Ly α emission reveal a complex three-dimensional distribution of atomic hydrogen in the Saturn system.
Ultraviolet Spectrometer Observations of Neptune and Triton
Results from the occultation of the sun by Neptune imply a temperature of 750 � 150 kelvins in the upper levels of the atmosphere (composed mostly of atomic and molecular hydrogen) and define the
The recent expansion of Pluto's atmosphere
Observations at a variety of visible and infrared wavelengths of an occultation of a star by Pluto in August 2002 reveal evidence for extinction in Pluto's atmosphere and show that it has indeed changed, having expanded rather than collapsed, since 1988.
Interaction of the solar wind with the local interstellar medium: A multifluid approach
A distinct fluid description for neutral hydrogen originating from either the interstellar medium, the heliosheath, or the solar wind has been developed to describe the detailed interaction of the
Upper Limit on Titan's Atmospheric Argon Abundance
Abstract The Voyager 1 Ultraviolet Spectrometer (UVS) solar occultation data and a spectrum of the North Polar Region dayglow obtained during the Titan flyby are analyzed to infer an upper limit on