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This question already has an answer here:

I'm trying to understand what causes a black hole in terms of it's composition.
We know a start can die and collapse into a neutron star, but if the neutro star is not dense enough to create a black hole, then what it is inside?
I mean, what is more dense than a neutrons glued together? Is a "quarks" star? are the neutrons destroyed and all the quarks inside put together?

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marked as duplicate by Qmechanic Apr 16 at 14:58

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  • $\begingroup$ Related: physics.stackexchange.com/q/127179/25301 $\endgroup$ – Kyle Kanos Apr 16 at 14:57
  • $\begingroup$ Possible duplicates: physics.stackexchange.com/q/401668/2451 and links therein. $\endgroup$ – Qmechanic Apr 16 at 14:59
  • $\begingroup$ maybe duplicate yes, but was not answered. I mean what could cause in terms of particles a black hole? if neutrons create a neutron star, and quarks create a quark star, how can create a black hole? what is more dense than quarks glued together? $\endgroup$ – Enrique Apr 16 at 15:04