http://www.FreeScienceLectures.com Sagan was central to the discovery of the high surface temperatures of the planet Venus.
In the early 1960s, no one knew for certain the basic conditions of Venus' surface and Sagan listed the possibilities in a report later depicted for popularization in a Time-Life book, Planets - his own view was that the planet was dry and very hot, as opposed to the balmy paradise others had imagined.
He had investigated radio emissions from Venus and concluded that there was a surface temperature of 500
