Quantcast
Last updated on April 20, 2014 at 17:20 EDT
NASAs Fermi Catches Thunderstorms Hurling Antimatter into
33 of 108

NASA's Fermi Catches Thunderstorms Hurling Antimatter into Space

January 10, 2013
On Dec. 14, 2009, while NASA's Fermi flew over Egypt, the spacecraft intercepted a particle beam from a terrestrial gamma-ray flash (TGF) that occurred over its horizon. Fermi's Gamma-ray Burst Monitor detected the signal of positrons annihilating on the spacecraft -- not once, but twice. After passing Fermi, some of the particles reflected off of a magnetic "mirror" point and returned. Credit: NASA's Goddard Space Flight Center