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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 IExpand
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Detection of an oxygen atmosphere on Jupiter's moon Europa
EUROPA, the second large satellite out from Jupiter, is roughly the size of Earth's Moon, but unlike the Moon, it has water ice on its surface1. There have been suggestions that an oxygen atmosphereExpand
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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.Expand
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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Three sets of previously unpublished Voyager ultraviolet spectrometer (UVS) observations in H Ly α emission reveal a complex three-dimensional distribution of atomic hydrogen in the Saturn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.Expand
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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 theExpand
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LEGEND - a three-dimensional LEO-to-GEO debris evolutionary model
Abstract A new orbital debris evolutionary model is being developed by the NASA Orbital Debris Program Office at Johnson Space Center. LEGEND, a LEO-to-GEO Environment Debris model, is capable ofExpand
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An Analysis of 17 Years of Voyager Observations of the Diffuse Far-Ultraviolet Radiation Field
We have systematically reduced 17 years of data from the Voyager ultraviolet spectrometer (UVS) archives, from which we have obtained 431 spectra that place useful limits on the diffuseExpand
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The recent expansion of Pluto's atmosphere
Stellar occultations—the passing of a relatively nearby body in front of a background star—can be used to probe the atmosphere of the closer body with a spatial resolution of a few kilometres (ref.Expand
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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 theExpand
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