Carl Edward Sagan	Robert Norman "Bob" Ross
Carl Edward Sagan (November 9, 1934 - December 20, 1996) was an American astronomer, astrophysicist, cosmologist, author, science popularizer and science communicator in astronomy and natural sciences.	Robert Norman "Bob" Ross (October 29, 1942-July 4, 1995) was an American painter, art instructor, and television host. He is best known as the creator and host of The Joy of Painting, a television program that ran for more than a decade on PBS in the United States and Canada.