Supernovae

Supernova 1987A


SN 1987A


SN 1987A environs


The rings of SN 1987A (1994)


SN 1987A in November 2003


Light echoes from SN 1987A

Crab Nebula


Crab Nebula


Center of the Crab
Variations in the Crab: optical
Variations in the Crab: X-ray