Venus: A Map of Its Brightness Temperature

Science. 1963 Apr 26;140(3565):391-2. doi: 10.1126/science.140.3565.391.

Abstract

The 200-inch Hale telescope has been used to make high-resolution maps of the brightness temperature of Venus at wavelengths 8 to 14 microns. Resolution of about 1/30 of the disk reveals a general symmetry about the plane of the orbit, no daynight temperature effects, and a transient temperature anomaly in the southern hemisphere.