Supernovae and
nucleosynthesis. Interaction of supernovae and their
circumstellar media.
Left: SN 1987A. A recent image of the collision between
the supernova ejecta (seen as a faint blob in the center) and
the inner ring. HST picture from the SAINTS team.
Right: The Crab nebula. This is the remnant of a supernova
observed by Chinese astronomers 1054. ESO/VLT