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Q: What are the similarities between a neutron star and a black hole?
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What remains after supernova?

A neutron star or a pulsar, or a black hole.


Can any black hole turn into a neutron star?

No. A black hole will remain a black hole. A neutron star is a remnant of a star not massive enough to become a black hole.


What is the difference between a black hole and neutron star?

See related questions.


What happens when a star is too small to be a black hole but too big to be a neutron star?

There's no mass range that's between "collapses into a neutron star or pulsar" and "collapses into a black hole". It'll be one or the other.


Is a neutron star or a black hole bigger?

A black hole has more mass than a neutron star, but if you are comparing volume it would depend on the mass of the black hole. A neutron star is estimated to be about 14 miles in diameter, which is larger than the event horizon of a black hole up to about 3.8 times the mass of the sun. A more massive black hole will be larger.


What is bigger a black hole or a neutron star?

It all relates to what you define as big. A black hole is an infinite region in space with an infinite density. It's "event horizon" is not infinite. If you wish to categorise between size of a neutron star and a black hole's "event horizon", then a black hole is, in most cases larger - but there are micro black holes, which exhibit all the characteristics of a black hole but have a much smaller "event horizon". In the physical sense, everything is bigger than a black hole, but in a terminological sense (the event horizon) it would depend on the mass of the black hole.


When was a star is dead?

When it turns into a black dwarf neutron star or black hole.


What is the size of a black hole?

about 1/3 of a neutron star


When will a black hole form?

after a neutron star collapses on itself


How does a black hole and a neutron star form?

when a star dies


What factor determines if a neutron star forms or a black hole forms after a supernova explosion?

It all depends on mass. If its over the point of where a neutron star can form then it forms a black hole. If its below it then it'll form a neutron star.


What is the relationship between the words supergiant supernova neutron star and black hole?

They are all astronomical terms for stars or star related.