Which university did Carl Sagan teach at for most of his career?

Carl Sagan taught at Cornell University for most of his career. After Harvard denied him tenure in 1968, Sagan moved to Cornell in Ithaca, New York, where he remained a faculty member for nearly 30 years, until his death in 1996.

At Cornell, Sagan became a full professor in 1970 and directed the Laboratory for Planetary Studies. From 1972 to 1981, he also served as associate director of the Center for Radiophysics and Space Research. In 1976, he was appointed the David Duncan Professor of Astronomy and Space Sciences, a title he held for the rest of his life.

A common mix-up is Harvard, where Sagan had worked before Cornell and where he was denied tenure. Caltech was also connected to his early scientific career, but Cornell was his long-term academic home. His Cornell years combined planetary science, astronomy, NASA advising, and public communication, helping make him one of the best-known scientists of the twentieth century.