SN 2007sr
Encyclopedia
SN 2007sr was a supernova
that happened in NGC 4038. It was a type Ia supernova.
Supernova
A supernova is a stellar explosion that is more energetic than a nova. It is pronounced with the plural supernovae or supernovas. Supernovae are extremely luminous and cause a burst of radiation that often briefly outshines an entire galaxy, before fading from view over several weeks or months...
that happened in NGC 4038. It was a type Ia supernova.