A group of astronomers led by Dr Avishay Gal-Yam from Weizmann Institute of Science has identified a mysterious Wolf-Rayet star as the likely progenitor of SN 2013cu, a Type IIb supernova recently discovered in a distant galaxy known as UGC 9379. This image from the 1.5-m robotic telescope at Palomar Observatory shows SN 2013cu in the galaxy UGC 9379. Image credit: Avishay Gal-Yam et al. Wolf-Rayet stars are more than 20 times as massive as our Sun...
