Normally it is known as the supernova's progenitor star.
When a Red Giant or any large star explodes, it is called a super nova, creating a either a black hole or a neutron (pulsar) star.
Before a star is born, it is called a protostar.
I'm not sure what you mean. If your asking: 'What do you call a star that gets brighter when it explodes?' then that's called a supernova. It's what happens when a big star dies.
what do you call a dying sar that explodes into millions of lights
A supernova.
A star that explodes is called a supernova.
supernova
When a Red Giant or any large star explodes, it is called a super nova, creating a either a black hole or a neutron (pulsar) star.
Supervernova
A Nova or a Supernova.
Once a star explodes, it's no longer a star. The explosion itself is referred to as a "Super Nova."
When a star explodes, that's the end of the star. The stellar remnant - either a neutron star or a black hole is created instantly.
a supernova
When a star explodes and destroys itself, leaving only a dense core behind, it is called a Supernova. The only other option is when a star goes nova, where only the outer body of the star explodes, but the stellar remnant remains in place.
Before a star is born, it is called a protostar.
A star that is forming is called a protostar.
Supernova