Abstract
During the first three years of operation, the imaging Compton telescope COMPTEL on board of the Compton Gamma-Ray Observatory has observed MeV-gamma radiation from a variety of objects including pulsars, stellar black-hole candidates, supernova remnants, extended regions of interstellar space, nuclei of active galaxies, gamma-ray bursters and solar flares. In the field of gamma-ray line spectroscopy, COMPTEL has achieved a major break-through with the establishment of the first map of the galactic plane in the light of the 1.8 MeV line from radioactive 26Al, with the discovery of the 1.15 MeV 44Ti-line from Cas A, and with the first detection of gamma-ray emission from the Orion complex in the 3 to 7 MeV range that can be identified with the 4.44 MeV and 6.13 MeV nuclear deexcitation lines of 12C ∗ and 16O ∗, respectively. An overview about the COMPTEL highlight results is given.
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