High Energy Mystery lurks at the Galactic Center PPARC -- A mystery lurking at the centre of our own Milky Way galaxy - an object radiating high-energy gamma rays - has been detected by a team of UK astronomers working with international partners.     Their research, published today (September 22nd) in the Journal Astronomy and Astrophysics, was carried out using the High Energy Stereoscopic System (H.E.S.S.), an array of four telescopes, in Namibia, South-West Africa...