Deep inside an astronomer's head, a parasite (voiced by Alan Tudyk) taps into his brain to learn about...science! Specifically, about why astronauts appear weightless in space. Wil Wheaton co-stars.

NOTGLaDOS: Fusion vs. Fission

It's the series Aint-It-Cool-News calls ''the most (intentionally) hilarious series of educational films you'll find...the pieces carry a Muppets-esque charm.'' Alan Dyer at Discovery.com says it's ''a lot of fun, and breaks the mold for NASA videos.'' Recently a top-10 finalist for ''Best Science/Technology Podcast'' at the 2008 Podcast Awards, IRrelevant Astronomy is packed with CG animation and snarky humor, all wrapped around the latest astronomy news and science from NASA's Spitzer Space Telescope. It's infrared-relevant!