Comet Enthusiast

The H.E.S.S. telescope system detectspotentially Earth-threatening  high-energy rays from the starburst region of a galactic system outside the Milky Way. Between 2005 and 2008, astrophysicists used the H.E.S.S. telescope system in Namibia over a total observation period of 119 hours to detect the expected gamma rays at energies exceeding 220 GeV (billion electronvolts). The source of these rays lies precisely at the optical center of NGC 253  one our closest spiral galaxies outside the so-called local group of our Milky Way and its companions at a distance of some twelve million light years away.