Question

What is a supernova?​

Answer 1

Answer:

A supernova is a powerful and luminous stellar explosion. This transient astronomical event occurs during the last evolutionary stages of a massive star or when a white dwarf is triggered into runaway nuclear fusion

Answer 2

Explanation:

a star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass.

A supernova is a powerful and luminous stellar explosion. This transient astronomical event occurs during the last evolutionary stages of a massive star or when a white dwarf is triggered into runaway nuclear fusion.