what is it called when an agging stars explode? A. iris B. singularity C. supernova D. pulsar E. event horizon

Some types of stars expire with titanic explosions, called supernovae. When a star like the Sun dies, it casts its outer layers into space, leaving its hot, dense core to cool over the eons ... As more supernovae are discovered, though, the line dividing the two categories is blurring.

-nasa