Just when you're numbing to robot, zombie and nuclear apocalypse scenarios, some old-fashioned asteroid paranoia pops up to surprise you. The B612 Foundation, which gets funding from, well, anyone, has just announced plans to launch Sentinel, a space telescope which will wander the vacuum cataloging asteroids in our inner solar system. Their goal is to track asteroid orbits and predict large impacts up to 100 years in advance, giving us plenty of time to find a solution (or enjoy our final days). Construction doesn't start til late fall, with the launch expected in around five years, so it won't be any use in disproving the 2012 doomsday believers out there. You can find out more about the project and donate to the foundation at the source link, or jump past the break for a video explanation, Aerosmith not included.