Neil deGrasse Tyson may be the most recognizable astronomer on Earth these days, in part due to his frequent appearances on The Colbert Report.
Earlier this year In 2010, Colbert sat down with Neil at the Kimberley Academy in Montclair, New Jersey and chatted with him about life, the Universe, and everything. Colbert did this out of his TV character -- well, mostly -- and even though it's over an hour, it's well worth your time. The original video is on the Hayden Planetarium site, but it's also all over the place, including YouTube. I've embedded it here for your enjoyment, too.
Neil and I agree on a wide variety of topics, and he's doing a great job inspiring people to look beyond their own immediate surroundings.