If no singularity, what’s inside a big black hole?

In summary, string theory and loop quantum gravity propose the elimination of black hole singularities. This raises the question of what the interior of a stellar size black hole would contain. Some suggest a new ultra dense state of matter, while others propose a breakdown of spacetime into a "spacetime foam." Numerous papers have been published on this topic, including the recent paper by Gambini, Pullin, and Campiglia. However, it is still a subject of ongoing research and there is no consensus on a concrete proposal. The underlying idea is that at extremely high densities, the distinction between matter and space disappears and is replaced by a chaotic and unsmooth "foam" of microscopic degrees of freedom. This concept is also believed to have
  • #176
The amount of matter to energy conversion could be dependant on the size of the black hole. A smaller black hole could have more matter and a black hole with a large radius could have more energy. But with the lack of a definitive quantum gravity there would be no way to know for sure on how much matter or energy a black hole would contain.
 
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  • #177
Then again, if time stops at the event horizon when would an object find itself at the center of a black hole?
 
  • #178
If a quark/radiation star existed in a black hole, and was supported by radiation pressure, would gravity in the star be Newtonian or relativistic? (Gravity outside the star would be obviously relativistic.)
 
  • #179
I don't get what you mean by the gravity being Newtonian. I would hope not since relativity is supposed to describe gravity more accurately than Newtonian physics.
 
  • #180
I think that, as the exit velocity became greater than the speed of light, it may become farther from being general relativity, than general relativity is from newtoinion physics outside of the black hole, IIF the exit velocity being greater than the speed of light allowed objects in the black hole to travel FTL. Tachyon's have not really been proven to not exist, so then it would look more like tachyon particle physics.
 
  • #181
Relativistic gravity is where space or the path of light is significantly curved. If you had a situation where radiation pressure was strong enough to counteract gravity, wouldn’t the path of light be random 3-axis thermal motion instead of a curved line?
 
<h2>1. What is a black hole?</h2><p>A black hole is a region in space with a gravitational pull so strong that nothing, including light, can escape its grasp. It is formed when a massive star dies and collapses in on itself.</p><h2>2. What is the singularity at the center of a black hole?</h2><p>The singularity is a point of infinite density and zero volume at the center of a black hole. It is where the laws of physics as we know them break down and our current understanding of the universe cannot explain what happens there.</p><h2>3. If there is no singularity, what is inside a black hole?</h2><p>It is currently unknown what exists inside a black hole without a singularity at its center. Some theories suggest that there may be a region of space-time beyond the event horizon, while others propose that the singularity may be replaced by a core of exotic matter.</p><h2>4. How do we study the inside of a black hole?</h2><p>Since nothing can escape the gravitational pull of a black hole, it is currently impossible to directly observe what is inside. Scientists study black holes by observing their effects on surrounding matter and using mathematical models and simulations to understand their behavior.</p><h2>5. Can anything survive inside a black hole?</h2><p>It is highly unlikely that anything can survive inside a black hole. The intense gravitational forces would tear apart any known form of matter. However, some theories suggest that certain types of exotic matter may be able to withstand the conditions inside a black hole.</p>

1. What is a black hole?

A black hole is a region in space with a gravitational pull so strong that nothing, including light, can escape its grasp. It is formed when a massive star dies and collapses in on itself.

2. What is the singularity at the center of a black hole?

The singularity is a point of infinite density and zero volume at the center of a black hole. It is where the laws of physics as we know them break down and our current understanding of the universe cannot explain what happens there.

3. If there is no singularity, what is inside a black hole?

It is currently unknown what exists inside a black hole without a singularity at its center. Some theories suggest that there may be a region of space-time beyond the event horizon, while others propose that the singularity may be replaced by a core of exotic matter.

4. How do we study the inside of a black hole?

Since nothing can escape the gravitational pull of a black hole, it is currently impossible to directly observe what is inside. Scientists study black holes by observing their effects on surrounding matter and using mathematical models and simulations to understand their behavior.

5. Can anything survive inside a black hole?

It is highly unlikely that anything can survive inside a black hole. The intense gravitational forces would tear apart any known form of matter. However, some theories suggest that certain types of exotic matter may be able to withstand the conditions inside a black hole.

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