The Fermi Gamma-ray Space Telescope at 15: Observing the Vibrant UniverseThe Fermi Gamma-Ray Space Telescope’s Large Area Telescope (LAT), initially conceived of in the 1990’s here at Stanford and SLAC, was designed, built and is operated by an international scientific collaboration. Launched on June 8, 2008, Fermi has brought new insights into pulsars and neutron stars, supernova remnants, cosmic rays, ...