Photons from the Universe - New Frontiers in Astronomy
arXiv:hep-ph/9710362
Abstract
This century has seen a dramatic increase in observational possibilities of the physics of the universe. Several of the very recent new developments with emphasis on the particle physics aspect and in particular Gamma-Gamma interactions are briefly discussed in this talk.
14 pages, invited talk at the Gamma-Gamma conference ``Photon '97'', Egmond aan Zee, The Netherlands, May 1997