Sagan¹, Carl (Edward) (1934-96), American astronomer. Sagan showed that amino acids can be synthesized in an artificial primordial soup irradiated by ultraviolet light - a possible origin of life on the earth. He wrote several popular science books, and was co-producer of the television series Cosmos (1980).

Sagan², Françoise (1935-2004), French novelist, dramatist, and short-story writer; pseudonym of Françoise Quoirez. She rose to fame with her first novel Bonjour Tristesse (1954); in this and subsequent novels she examined the transitory nature of love as experienced in brief liaisons.