Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jansc..32....1b&link_type=abstract
(American Astronautical Society, Goddard Memorial Symposium, 21st, Mar. 24, 25, 1983) Journal of the Astronautical Sciences (ISS
Astronomy and Astrophysics
Astronomy
Comets, Natural Satellites, Planets, Space Probes, Spaceborne Astronomy, Ultraviolet Spectroscopy, Galileo Probe, Hubble Space Telescope, Io, Mars Atmosphere, Saturn Rings, Venus Atmosphere, Voyager Project
Scientific paper
The period from the mid-1960s through the 1980s is a time of spectacular discoveries in planetary astronomy. Voyager 1 observations of Saturn's rings, which had an improvement of over a hundred times the resolution of ground-based telescopes, showed hundreds of ringlets. The Voyager 2 stellar occultation experiment provided another factor of one hundred in resolution to reveal wave structure in Saturn's rings. The Mariner 6 ultraviolet spectrometer discovered atomic hydrogen in the exosphere of Mars and measured its rate of escape. The Pioneer-Venus ultraviolet spectrometer discovered 'hot' oxygen atoms in the exosphere of Venus. Sounding rocket experiments and the International Ultraviolet Explorer have measured hydrogen, oxygen, carbon, and sulfur atoms and their molecules in comet spectra. The Voyager ultraviolet spectrometer discovered extreme ultraviolet radiation emanating from the Io torus. The Galileo ultraviolet spectrometer will measure the atmosphere of Jupiter, the surfaces of the satellites, and Io's torus from orbit about Jupiter in the late 1980s. Also in the late 1980s, the Space Telescope ultraviolet spectrometers are well-suited for long term observations of the outer planets.
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