Astronomers Spy Supernova’s Giant Companion Star

From the UC Davis News article:

"Astronomers have spied the short-lived blue glow from a giant companion star struck by a spectacular supernova. The discovery offers compelling evidence for a leading theory about the origin of Type Ia supernovae — that these enormous explosions occur when a white dwarf steals matter from a larger star."

You can read the full article on the UC Davis News website.