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Ultraviolet Observations of Venus from Mariner 10: Preliminary Results
A. L. Broadfoot, S. Kumar, M. J. S. Belton and M. B. McElroy
New Series, Vol. 183, No. 4131 (Mar. 29, 1974), pp. 1315-1318
Published by: American Association for the Advancement of Science
Stable URL: http://www.jstor.org/stable/1737504
Page Count: 4
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An objective grating spectrometer on Mariner 10 has measured airglow in the wavelength range 200 to 1700 angstroms. The data reveal the presence of significant concentrations of hydrogen, helium, carbon, and oxygen atoms in the upper atmosphere of Venus. A preliminary analysis of the hydrogen data indicates an exospheric temperature of 400 ° K. There is evidence for intense airglow emission at wavelengths longward of 1350 angstroms; the nature of this emission is unclear, but the radiation is spatially extensive and detectable on both day and night sides of the planet.
Science © 1974 American Association for the Advancement of Science