Highly recommended: a recent presentation given on the Google campus by Prof. Raja GuhaThakurta of UC Santa Cruz.
It runs an hour and a quarter, but it’s so packed with interesting ideas, pictures, and simulation videos of galaxy collisions, etc that you don’t notice the time. Give up that Seinfeld rerun and give it a try. Google Tech Talk videos like this one are offered in several resolutions to match your PC and web connection speed–use 720 HighDef if you can. Just make sure you view it full-screen.
Here’s the link!: Our Place in the Cosmos