Reports

Infrared Image of Venus at the Time of Pioneer Venus Probe Encounter

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Science  23 Feb 1979:
Vol. 203, Issue 4382, pp. 785-787
DOI: 10.1126/science.203.4382.785

Abstract

An image of the infrared emission from the Earth-facing hemisphere of Venus was obtained at the time the Pioneer Venus probes penetrated the atmosphere. The thermal structure of the atmosphere at the 85-millibar level included regions of rapidly varying polar features, a solar-related postdawn warm area, and a nonsolar-fixed nighttime warm area. The probes succeeded in entering each of these three thermal regions.