B Why Don't We Live Inside a Black Hole?

  • B
  • Thread starter Thread starter Narasoma
  • Start date Start date
  • Tags Tags
    Black hole Hole
Narasoma
Messages
42
Reaction score
10
We know the Big Bang Theory states that our universe was started from a hot-dense point. But should't it became black hole and every matter and radiation pulled to singularity? We would not be her if that is the case.
 
Physics news on Phys.org
Narasoma said:
We know the Big Bang Theory states that our universe was started from a hot-dense point.
It is unfortunate that you "know" that, since it's not true.

The "Big Bang Theory" doesn't actually say anything about how the universe started. That is, that theory does not posit a creation event. It posits a starting universe in a hot dense state, which may have been infinite in extent or may have been finite, but if finite, it was not a single point in space. That plasma state evolved into the universe we live in today.
Narasoma said:
But should't it became black hole and every matter and radiation pulled to singularity? We would not be her if that is the case.
I suggest a forum search. the question has been answered here dozens of times as to why we don't live in a black hole.
 
Last edited:
Narasoma said:
But should't it became black hole and every matter and radiation pulled to singularity?
A black hole is a vacuum spacetime. The Big Bang is based on a spacetime with matter everywhere. They are not equivalent.
 
  • Like
Likes vanhees71 and PeroK
Narasoma said:
should't it became black hole and every matter and radiation pulled to singularity?
No. The matter and radiation in the early universe was expanding very rapidly. Far too rapidly for any of it to collapse to a black hole, even at the very high densities of the early universe.
 
Thread 'Can this experiment break Lorentz symmetry?'
1. The Big Idea: According to Einstein’s relativity, all motion is relative. You can’t tell if you’re moving at a constant velocity without looking outside. But what if there is a universal “rest frame” (like the old idea of the “ether”)? This experiment tries to find out by looking for tiny, directional differences in how objects move inside a sealed box. 2. How It Works: The Two-Stage Process Imagine a perfectly isolated spacecraft (our lab) moving through space at some unknown speed V...
Does the speed of light change in a gravitational field depending on whether the direction of travel is parallel to the field, or perpendicular to the field? And is it the same in both directions at each orientation? This question could be answered experimentally to some degree of accuracy. Experiment design: Place two identical clocks A and B on the circumference of a wheel at opposite ends of the diameter of length L. The wheel is positioned upright, i.e., perpendicular to the ground...
According to the General Theory of Relativity, time does not pass on a black hole, which means that processes they don't work either. As the object becomes heavier, the speed of matter falling on it for an observer on Earth will first increase, and then slow down, due to the effect of time dilation. And then it will stop altogether. As a result, we will not get a black hole, since the critical mass will not be reached. Although the object will continue to attract matter, it will not be a...
Back
Top