Sagan, Carl, 1934-1996 (Nombre personal)

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His Physical studies of planets, 1960.

Washington post, 21 December 1996, p. A 12 (died at age 62; astronomer; at age 25, doctoral thesis, Physical studies of planets)

Carl Sagan's cosmic connection, 2000: CIP t.p. (Carl Sagan) pub. info. (Carl Edward Sagan; b. Nov. 9, 1934; d. Dec. 20, 1996)

Wikipedia, September 8, 2015 (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; born Brooklyn, New York; died Seattle, Washington; spent most of his career as a professor of astronomy at Cornell University, where he directed the Laboratory for Planetary Studies)

Encyclopædia Britannica online, January 17, 2020 (Carl Sagan, in full Carl Edward Sagan, (born November 9, 1934, Brooklyn, New York, U.S.--died December 20, 1996, Seattle, Washington), American astronomer and science writer; attended the University of Chicago, where he earned a bachelor's and a master's degree in physics in 1955 and 1956, respectively, and a doctorate in astronomy and astrophysics in 1960. From 1960 to 1962 he was a fellow in astronomy at the University of California, Berkeley, and from 1962 to 1968 he worked at Harvard University and the Smithsonian Astrophysical Observatory; in 1968 he became the director of Cornell University's Laboratory for Planetary Studies; although Sagan did important research on planetary atmospheres, in astrobiology, and on the origin of life on Earth, he made his reputation primarily as a spokesman for science and a popularizer of astronomy; in 1980 cofounded the Planetary Society; wrote the television series Cosmos with his wife Ann Druyan; author of science-fiction novel Contact (1985))