Watch this jaw-dropping video of a pulsar's beating heart

NASA's Fermi Gamma-ray Space Telescope is an observatory in low Earth orbit that the Agency uses to study some of the most high-energy sources of radiation in the Universe. Its wide-eyed Large Area Telescope (LAT) makes a sweep of the entire sky every three hours, soaking up gamma rays that emanate from cosmic… » 3/01/13 1:20pm 3/01/13 1:20pm