Explore the life and contributions of Carl Sagan, the renowned astronomer and science communicator, in this 23-minute video from the "Heroes and Discoveries of Astronomy" series. Delve into Sagan's Pulitzer-winning work, his research on extraterrestrial life, and his groundbreaking television show "Cosmos." Discover how Sagan made astronomy accessible and engaging for the public, and examine the importance of scientific storytelling. Learn about the history of planetariums, the intersection of science fiction and astronomy, and the necessity of science communication. Investigate the practical applications of astronomy and understand why this field remains crucial in today's world.