SN 1939C was a supernova in the Fireworks Galaxy first discovered on 17 July 1939, by which Swiss astronomer, who worked most of his life at the California Institute of Technology?
SN 1939C: SN 1939C was a supernova in the Fireworks Galaxy first discovered by Fritz Zwicky on 17 July 1939. Fritz Zwicky: Fritz Zwicky (February 14, 1898 – February 8, 1974) was a Swiss astronomer.
Fritz Zwicky