Carl Edward Sagan (/ ˈseɪɡən /; SAY-gən; November 9, 1934 – December 20, 1996) was an American astronomer, planetary scientist and science communicator.

Dec 16, 2025 · Carl Sagan, American astronomer and science writer. A popular and influential figure in the United States, he was controversial in scientific, political, and religious circles for his views on …

Nov 4, 2024 · Carl Sagan (1934 – 1996) played a leading role in the American space program from its very beginning. He was a consultant and adviser to NASA beginning in the 1950s — he briefed the …

Apr 2, 2014 · Best Known For: Carl Sagan was one of the most well-known scientists of the 1970s and 1980s. He studied extraterrestrial intelligence, advocated for nuclear disarmament and co-wrote and …

Carl Sagan was the world’s best known scientist in the late 20th century, serving as our guide to the planets during the golden age of solar system exploration.

Apr 14, 2023 · Sagan published more than 600 scientific papers and articles and was author, co-author or editor of more than 20 books. His early research focused on the origin and evolution of the solar …

Nov 5, 2024 · Sagan propelled science forward in at least three important ways. He produced notable results and insights described in over 600 scientific papers. He enabled new scientific disciplines to...

Items from Carl Sagan's papers illustrate the many facets of his career. More broadly, these items speak to the range of roles scientists play in society. Most Americans know Carl Sagan best as a public …

He was a consultant and adviser to NASA beginning in the 1950s, he briefed the Apollo astronauts before their flights to the Moon, and was an experimenter on the Mariner, Viking, Voyager, and …

Nov 9, 2024 · Bottom line: Carl Sagan would have turned 90 on November 9, 2024. Here’s a look at his accomplishments and the contributions he made to the world of astronomy and science.