This article is a stub. You can help Googology Wiki by expanding it. Carl Sagan (November 9, 1934 – December 20, 1996) was an American astronomer. His surname is part of the googologisms Sagan and Sagan's number. Retrieved from "https://googology.wikia.org/wiki/Carl_Sagan?oldid=303530" Categories: Article stubs People Community content is available under CC-BY-SA unless otherwise noted.