Elliott Gesteau

[Elliott Gesteau @EGesteau]

@Warren_Tilston In the star you would also have gluons to convey the strong nuclear interaction. The mass density of the star is really high, about 10^17 kg per cubic meter. You cannot really talk about a notion of isotope here, since the gravitational force plays a role, unlike in atoms.

[Elliott Gesteau @EGesteau]

@curelet @asymptotia That's still an open question ! What we do know is that Einstein's theory of gravity breaks down and we have to find something else involving quantum mechanics to answer the question. String theory, loop quantum gravity and plenty of other theories are trying to do this.

[Elliott Gesteau @EGesteau]

@Gypsykenny @Perimeter For monopoles, their existence is still not proved. They are hypothetical object that formed in the early universe (at a very different time than astrophysical black holes). As there is no way of going back in time it is impossible to go back into a white hole.

[Elliott Gesteau @EGesteau]

@Gypsykenny @Perimeter You might be thinking of neutron stars here, which are the most dense objects which are not black holes. However, black holes can not be neutron stars because they are so dense that unlike neutron stars, light can not escape from them.

[Elliott Gesteau @EGesteau]

@americanbouy @Perimeter Hi, thanks for the question ! In fact it's really difficult to define a precise "membrane" for such a quantum object as a proton. What we call "size of a proton" is in fact a number which describes the reach of the force that holds it together.