Gamma Ray bursts were first stumbled upon back in the 1960s. They built telescopes to pick up on secret thermonuclear tests by the Soviets and Chinese, but they also began picking up on Gamma Rays generated from huge explosions in outer-space. Though this confounded scientists at the start, they now accept that these explosions go off about once a day.
Now, with the help of NASA satellites, Swift mission, and the Fermi Gamma-ray Space Telescope, we have images of the biggest gamma ray burst ever recorded. This vivid burst in the constellation Leo was so large that scientists now have much more information to study.