SN 2003B
Encyclopedia
SN 2003B was a 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 1097 on January 5, 2003. It was a type II supernova.
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