What is a supernova?

a. A supernova occurs when a Jovian gas giant implodes from galactic cooling. It occurs when a Jovian gas giant is formed. It is very energy intensive.

b. A supernova occurs when white dwarf star cools and implodes. It occurs when a new white dwarf is formed. It is very energy intensive.

c. A supernova occurs when a red super giant star explodes. It occurs when an aging massive star is nearing the end of its life. a supernova expels much of a star’s material into space and is very energy intensive.

d. A supernova occurs when the moon collides with a planet. The material from the collision is exploded into space. It is very energy intensive.