AST-1A Lecture Notes - Lecture 22: Venera 3, Acid Rain, Venera 4
Document Summary
Goal- to understand the difference between venus and earth. Same size and composition as the earth. First probe sent by russia in 1959 (shortly after sputnik) Venera 3 landed in 1965, but was destroyed on impact. Venera 4 in 1967 parachuted to the surface, but crushed before it reached the surface (at altitude of 25 km) (15 miles above the surface). By 1970, and venera 7, russia made a probe which could withstand higher temperatures for a short time period. Venus"s current atmosphere (vs 0. 03% on the earth) Venus has more nitrogen than the earth. On venus, the atmosphere is so thick that effectively you have more than 1 greenhouse layer. The lowest layer is heated by the layer above it, and when it radiates energy, half goes to the surface, and half goes to the layer above. The layer above absorbs that, then emits energy half down to the layer below, and half upwards.
