Dr. Carl Sagan, astrophysicist and author of bestselling book Cosmos, starred in 1980 award-winning television series Cosmos: A Personal Voyage. Sagan did much to make astronomy relevant to the public. Sagan delivered message with an "...ability to capture the imagination of millions and to explain difficult concepts in understandable terms is a magnificent achievement," according to The Carl Sagan Portal. A link to full 13 episodes available here for those, who may have missed tremendous 1980 series. They're free--enjoy them!