<p>While it is possible that some black holes (called primordial black holes) were formed in the early universe, in general most of the matter-energy did not collapse into these, since while extremely dense, early universe was also extremely uniform: there simply wasn't significant enough concentrations of mass-energy to form such black holes before the universe expanded rapidly in the inflation phase.</p>

CC BY-SA 4.0
2022-03-21T00:48:53.860Z
2022-03-21T00:48:53.860Z
tuomas
<p>I was reading about <a href="https://en.wikipedia.org/wiki/Kugelblitz_(astrophysics)" rel="nofollow noreferrer">Kugelblitz</a> on Wikipedia, and it says that if enough energy gets concentrated it leads to a black hole (from where nothing can escape - supposedly). So, if during the Big-Bang, when all the energy of the universe was in a really small region of space, why didn't it lead to a black hole and stay forever like that?</p>

CC BY-SA 4.0
2022-03-21T00:32:40.470Z
A bh is an object in space, but not space itself
planetmaker
CC BY-SA 4.0
2022-03-21T08:24:26.580Z
Please see [Did the Big Bang happen at a point?](https://physics.stackexchange.com/q/136860/123208)
PM 2Ring
CC BY-SA 4.0
2022-03-21T10:20:36.507Z
Related: [Observable universe equals its Schwarzschild radius (event horizon)?](https://astronomy.stackexchange.com/q/32443/5264)
pela
<black-hole><astrophysics><big-bang-theory>
How is it possible that a Big Bang happened instead of becoming trapped as a Kugelblitz?
Joako
# How is it possible that a Big Bang happened instead of becoming trapped as a Kugelblitz?

(Asked by: username_0 on 2022-03-20)

I was reading about [Kugelblitz](https://en.wikipedia.org/wiki/Kugelblitz_(astrophysics)) on Wikipedia, and it says that if enough energy gets concentrated it leads to a black hole (from where nothing can escape - supposedly). So, if during the Big-Bang, when all the energy of the universe was in a really small region of space, why didn't it lead to a black hole and stay forever like that?

**Tags:** black-hole, astrophysics, big-bang-theory
> **Comments:**
> **username_1**: A bh is an object in space, but not space itself  
> **username_2**: Please see [Did the Big Bang happen at a point?](https://physics.stackexchange.com/q/136860/123208)  
> **username_3**: Related: [Observable universe equals its Schwarzschild radius (event horizon)?](https://astronomy.stackexchange.com/q/32443/5264)  

---

## 1 answers

### Answer by username_4 on 2022-03-21. Score: 3

While it is possible that some black holes (called primordial black holes) were formed in the early universe, in general most of the matter-energy did not collapse into these, since while extremely dense, early universe was also extremely uniform: there simply wasn't significant enough concentrations of mass-energy to form such black holes before the universe expanded rapidly in the inflation phase.


---

