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Science 25 July 1969:
Vol. 165. no. 3891, pp. 386 - 388
DOI: 10.1126/science.165.3891.386
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Articles

Solar Cycle Variation of Exospheric Temperatures Mars and Venus: A Prediction for Mariner 6 and 7

Richard W. Stewart 1 and Joseph S. Hogan 1

1 Institute for Space Studies, Goddard Space Flight Center, National Aeronautics and Space Administration, New York 10025

Calculations have been made to determine the effects of variations in the extreme ultraviolet solar radiation on the upper atmospheres of mars and Venus. The results indicate that the exospheric temperature from 300°K to 600°K during the solar cycle, with a corresponding range on Venus of 450°K to 850°K. At the present time, the temperature of the Martain exosphere should be approximately 500°K.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)