What is the name for the "stuff" at heart of black hole?

In summary, the "stuff" at the heart of a black hole is referred to as a "singularity" because it is a term used to describe the point where the mathematical model used to understand black holes breaks down and we are unsure of what is happening. This term is used in hopes that a theory of quantum gravity will eventually provide an explanation for the unknown "stuff" at the heart of black holes. This information was not easily found elsewhere, making it a helpful answer.
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Cindy Hops
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What is the name for the "stuff" (neither matter nor neutrons) at the heart of a black hole?
 
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The reason that the heart of a black hole is called a "singularity" is because the word singularity is just shorthand for "the place where the math model breaks down and we don't know WHAT is/was going on". In other words, it is unknown just what is at the heart of a black hole since the math gives unphysical results. The hope/belief is that if/when we get a solid theory of quantum gravity we might get an answer to that question.
 
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Likes Demystifier and vanhees71
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Wonderful answer! This explains why I could not find it anywhere else. Thanks!
 

1. What is the "stuff" at the heart of a black hole called?

The "stuff" at the heart of a black hole is called the singularity. It is a point of infinite density and zero volume where the laws of physics as we know them break down.

2. How is the singularity formed in a black hole?

The singularity is formed when a massive star collapses under its own gravity at the end of its life. As the star's core collapses, it becomes denser and more and more matter is packed into a smaller and smaller space, eventually forming the singularity.

3. Can anything escape from the singularity in a black hole?

No, nothing can escape from the singularity in a black hole. The gravitational pull is so strong that not even light can escape, which is why we cannot see the singularity directly.

4. Is the singularity the only part of a black hole?

No, the singularity is just one part of a black hole. Surrounding the singularity is the event horizon, which is the point of no return for anything that gets too close to the black hole.

5. What happens to matter that falls into the singularity of a black hole?

Once matter falls into the singularity of a black hole, it is crushed and stretched to infinite density and is no longer recognizable as matter. It becomes part of the singularity and its mass contributes to the overall mass of the black hole.

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