Reports

Mercury: Anomalous Absence from the 3.4-Millimeter Radio Emission of Variation with Phase

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Science  28 Jan 1966:
Vol. 151, Issue 3709, pp. 445-447
DOI: 10.1126/science.151.3709.445

Abstract

Radio observations of Mercury at 3.4 millimeters from July to October 1965 showed, contrary to expectation, brightness temperatures of only about 200°K, even when major fractions of Mercury's illuminated hemisphere were observed. There was no significant variation with phase.