When was the American astronomer, cosmologist, astrophysicist, astrobiologist died who's introduction is in The Space Gods Revealed?
Carl Sagan Carl Edward Sagan ( ; November 9, 1934 – December 20, 1996) was an American astronomer, cosmologist, astrophysicist, astrobiologist, author, science popularizer, and science communicator in astronomy and other natural sciences. He is best known for his work as a science popularizer and communicator. His best known scientific contribution is research on extraterrestrial life, including experimental demonstration of the production of amino acids from basic chemicals by radiation. Sagan assembled the first physical messages sent into space: the Pioneer plaque and the Voyager Golden Record, universal messages that could potentially be understood by any extraterrestrial intelligence that might find them. Sagan argued the now accepted hypothesis that the high surface temperatures of Venus can be attributed to and calculated using the greenhouse effect.
Chris Lintott Christopher John "Chris" Lintott (born 26 November 1980) is a Professor of Astrophysics in the Department of Physics at Oxford University. Lintott is involved in a number of popular science projects aimed at bringing astronomy to a wider audience. He is the primary presenter of the BBC series "The Sky at Night", having previously been co-presenter with Sir Patrick Moore until Moore's death in 2012. Lintott co-authored "Bang! – The Complete History of the Universe" with Patrick Moore and Queen guitarist and astrophysicist Brian May.