Photograph of Carl Sagan
Robert Reichert and Cornell University.

Carl Sagan

Carl Sagan is an American astronomer who was born in 1934. He is famous for his research on the origins of life and his belief that life exists elsewhere in the universe.

Sagan became a leading figure in the search for extraterrestrial intelligence with his involvement in the Mariner, Viking, and Voyager spacecraft expeditions to Venus and the outer planets. He has made valuable contributions to the study of planetary atmospheres, planetary surfaces, and the history of Earth.

Sagan passed away on December 20, 1996.


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