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Unfalsifiable claims are uninteresting. Just Google the phrase "string theorists claim" and prepare to scroll through vast swaths of discarded theories.
It's one of those things that got public support as it fell out of favor in academia. Now it won't go away because the public likes it.
So, string theorists say this. OK, and? That's kind of interesting, I suppose, but... make a testable prediction.
> Black holes, the densest objects in the universe My mind was blown when I found out that mean density of black holes inside the event horizon can be quite low. > a super supermassive black hole with the mass of 4.3 billion Suns would have a density equal to one i.e. the same density as water. https://physics.stackexchange.com/a/218816
This is purely based on the definition of "density" here, which is the mass of the black hole divided by the volume inside the event horizon (which is the invisible/black sphere). However the event horizon does not represent the extent of the mass of the black hole, but rather the point where gravity becomes so strong that nothing can escape it, even light (hence "black" hole/sphere). We don't really know what's insi…
Is that entirely true? We can tell if the black hole is rotating because of the frame dragging that happens outside the event horizon. Could we tell anything about the radial distribution of mass from the shape of space outside the event horizon? (I'm asking; I don't know enough GR to know.)
Earlier quoted context omitted.
This is purely based on the definition of "density" here, which is the mass of the black hole divided by the volume inside the event horizon (which is the invisible/black sphere). However the event horizon does not represent the extent of the mass of the black hole, but rather the point where gravity becomes so strong that nothing can escape it, even light (hence "black" hole/sphere). We don't really know what's insi…
> We don't really know what's inside the event horizon or how the mass if actually distributed. Is that entirely true? We can tell if the black hole is rotating because of the frame dragging that happens outside the event horizon. Could we tell anything about the radial distribution of mass from the shape of space outside the event horizon? (I'm asking; I don't know enough GR to know.)
> One question that’s still unresolved is whether the supermaze versions of fuzzballs fully satisfy all the requirements scientists have for black holes The only question about supermaze fuzzballs blackholes, still unresolved, is what do string theorist smoke these days.
is what do string theorist smoke these days. What's with HN commenters, who are likely very unqualified to comment on string theory details, hating on people working in string theory? Is Sabine Hossenfelder's anti-string theory propaganda working that well?
Unfalsifiable claims are uninteresting. Just Google the phrase "string theorists claim" and prepare to scroll through vast swaths of discarded theories.
My understanding is that string theory has basically been tossed aside by most of the field. It's one of those things that got public support as it fell out of favor in academia. Now it won't go away because the public likes it.
Unfalsifiable claims are uninteresting. Just Google the phrase "string theorists claim" and prepare to scroll through vast swaths of discarded theories.
My understanding is that string theory has basically been tossed aside by most of the field. It's one of those things that got public support as it fell out of favor in academia. Now it won't go away because the public likes it.
Earlier quoted context omitted.
> We don't really know what's inside the event horizon or how the mass if actually distributed. Is that entirely true? We can tell if the black hole is rotating because of the frame dragging that happens outside the event horizon. Could we tell anything about the radial distribution of mass from the shape of space outside the event horizon? (I'm asking; I don't know enough GR to know.)
Well we do reasonably know that the mass must be very densely packed at the centre but we do not know exactly how, we do not know if there is a singularity or not.
> One question that’s still unresolved is whether the supermaze versions of fuzzballs fully satisfy all the requirements scientists have for black holes The only question about supermaze fuzzballs blackholes, still unresolved, is what do string theorist smoke these days.
I, for one, really enjoy the ideas they come up with. Super creative!