TEMPERATURES ON THE BRIGHT AND DARK SIDES OF VENUS

摘要: scope with vacuum thermocouples in full daylight when the planet was near meridian. Three different were used. Couple No. 36, made octagonal receivers 0.8 mm diameter, used most frequently.4 40, for lunar investigations, partially covered a silver shield which exposed only one receiver, 0.45 square. 42, 0.2 had been measures of details on Mars, also some detailed Venus. These thermocouples, each mass about 0.01 mg, blackened and cells rock-salt windows, evacuated to pressures lower than those X-ray tubes. A Leeds Northrup high-sensitivity galvanometer 1 -second period 150 ohms series reduce deflections increase speed registering them photographically.