Hail Sagan (Light) Tshirt Posted on 2012/12/26 by admin I'm a big fan of Carl Sagan's work, and I thought the “Hail Sagan” phrase was a great play on words. The shirt is Carl Sagan's head on a pentagram, with the words “Hail Sagan” beneath it. product tags: sagan, carl, cosmos, science, funny,