Using data from the Large Area Telescope (LAT) on board NASA’s Fermi Gamma-ray Space Telescope, astronomers have discovered a gamma-ray glow around Geminga, a pulsar located approximately 800 light-years away in the constellation Gemini. A faint gamma-ray glow around the Geminga pulsar. Image credit: NASA’s Goddard Space Flight Center / M. Di Mauro. A pulsar — a rapidly spinning neutron star — naturally surrounds itself with a cloud...
