Overview on direct and indirect measurements of cosmic rays - Some thoughts on galactic cosmic rays and the knee

Abstract

An overview is given on results from direct and indirect measurements of galactic cosmic rays. Their implications on the contemporary understanding of the origin of cosmic rays and the knee in their energy spectrum are discussed.Comment: Invited overview, presented at the 19th European Cosmic Ray Symposium, August 30th - September 3rd, 2004, Florence, Ital