We watch the series as well, and now that it has become the target of creationists, I'm certain Tyson will again soon be one of Bill Maher's guests. He has appeared several times, and it's always a terrific show when he sits on the panel. Cosmos is well done and most informative.
"I think I may say that of all the men we meet with, nine parts of ten are what they are, good or evil, useful or not, by their education." John Locke