  The shell-type supernova remnant RX J0852.0-4622 was detected in 2004 and
re-observed between December 2004 and May 2005 with the High Energy
Stereoscopic System (H.E.S.S.), an array of four Imaging Cherenkov Telescopes
located in Namibia and dedicated to the observations of gamma-rays above 100
GeV. The angular resolution of <0.1 degree and the large field of view of
H.E.S.S. (5 degrees diameter) are well adapted to studying the morphology of
the object in very high energy gamma-rays, which exhibits a remarkably thin
shell very similar to the features observed in the radio range and in X-rays.
The spectral analysis of the source from 300 GeV to 20 TeV will be presented.
Finally, the possible origins of the very high energy gamma-ray emission
(Inverse Compton scattering by electrons or the decay of neutral pions produced
by proton interactions) will be discussed, on the basis of morphological and
spectral features obtained at different wavelengths.
