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A supernova occurs when a high mass star dies and becomes a neutron star. As the core collapses because fusion burns out and radiation pressure can no longer hold it up, then degenerate electron pressure can not hold it up, the electrons are forced into the nucleus and combine with protons to form neutrons, the strong force causes the nuclei to merge into one ball of neutrons: a neutron star. The surface of the neutron star is very hard and as additional matter from the original star continues to fall in and merge into the neutron star, a "traffic jam" occurs and the shockwave resulting from this reflects off the super hard surface of the neutron star, driving the supernova explosion. Suddenly everything falling in is now rushing out. This can only occur once.

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Q: When does a star become a supernova?
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Related questions

The onset of iron fusion causes a star to become a?

A supernova


Could a supernova on Jupiter cause the earth to be pushed off it axis?

Only a very, very few stars have mass enough to become supernova. Jupiter is a planet not a star. It is far to small to become a star, let alone a supernova.


What is a star that explodes in supernova what does its core become?

Depending on the Mass of the core, they either become a Neutron Star or a Black Hole.


What kind of star is most likely to become a white-dwarf supernova?

A supernova is a star that has exploded into dust and gas. A white-dwarf is a small, hot, dense star nearing the end of its life, that did not have enough mass to go supernova. So the answer is "none".


What happens to a burnt out star?

If it's a big enough explosion it will become a supernova


Will a very large star go through several supernova explosions in its lifetime?

A star will become a supernova only once.However, a white dwarf can have multiple novaeruptions.See related questions


What is the Vela Supernova?

Well a supernova is the explosions or death of a star, so the Vela supernova is probably the supernova of the star vela!


What a star may become after a supernova explosion?

Usually a neutron star, or a black hole, depending on the remaining mass.


What is the definition for supernova in science?

Nova (plural novae) means "new" in Latin, The prefix "super-" distinguishes supernova from ordinary nova.


What can happen when stars collide?

They form a new star, or the might become a supernova......ouch


What are the types of stars a high mass star can become after it goes supernova?

Once a high mass star goes supernova, it doesn't become any other type of star - it becomes a pile of enormously dense stellar ash, or if it was big enough to begin with, it becomes a black hole.


Why do all stars end in a supernova?

Oops! Not all stars end up as a supernova. To become a Type 2 supernova, the star has to be between 8 and 50 times larger than the Sun.