PHYSICS AND THE COSMOS - THE ORIGIN OF COSMIC-RAYS OF LOW AND VERY HIGH-ENERGIES

The subject of 'cosmic rays' is one that embraces a vast range of part icle and photon energies and is an ideal one for examining 'Physics an d the Cosmos'. In the present work we examine the twin problems of the origin of cosmic rays of both low and very high energies and find tha t they are related by studies of the Magellanic Clouds. This remarkabl e result comes from the hypothesis that there is a Giant Halo surround ing the Galaxy, support coming from Magellanic Cloud observations. Als o examined is the flux of extragalactic gamma rays and its relevance t o the question of the asymmetry between matter and anti-matter in the Universe.