Fermi Finds Galactic Gamma-ray-emitting Bubbles
Fascinating discovery by Nasa’s Fermi Gamma-ray Space Telescope, which achieved first light in August 2008. Image credit: NASA’s Goddard Space Flight Center. From the Nasa press release NASA’s Fermi Gamma-ray Space Telescope has unveiled a previously unseen structure centered in the Milky Way. The feature spans 50,000 light-years and may be the remnant of an eruption from a supersized black hole at the center of our galaxy. “What we see are two gamma-ray-emitting bubbles that extend 25,000 light-years north and …