Abstract
BECAUSE of the favourable observing conditions, the planet Venus has frequently been observed in the radio spectrum for some years now. Recently, precise observations at the wave-length 3.3 cm were made by Bibikova et al.1. These observations were made after the inferior conjunction in Summer 1961. The authors found that the temperature of the planet was distinctly dependent on its phase. The mean temperature observed was about 544° K for the mean phase 0.47, and the value derived from the phase dependence for the inferior conjunction was found to be about 372° K. This large day–night contrast in temperature gives some support to Sagan's2 greenhouse model over Opik's3 aerospheric model of the Venusian atmosphere.
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LETFUS, V. Radio Emission of Venus at 3 cm and the Solar Activity. Nature 211, 176 (1966). https://doi.org/10.1038/211176a0
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DOI: https://doi.org/10.1038/211176a0
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