Date: 19/01/2019 12:30:53
From: Tau.Neutrino
ID: 1332483
Subject: Why Don't Black Holes Swallow All of Space?

Why Don’t Black Holes Swallow All of Space? This Explanation Is Blowing Our Tiny Minds

Black holes are great at sucking up matter. So great, in fact, that not even light can escape their grasp (hence the name).

But given their talent for consumption, why don’t black holes just keep expanding and expanding and simply swallow the Universe? Now, one of the world’s top physicists has come up with an explanation.

more….

Reply Quote

Date: 19/01/2019 13:03:49
From: mollwollfumble
ID: 1332502
Subject: re: Why Don't Black Holes Swallow All of Space?

Tau.Neutrino said:


Why Don’t Black Holes Swallow All of Space? This Explanation Is Blowing Our Tiny Minds

Black holes are great at sucking up matter. So great, in fact, that not even light can escape their grasp (hence the name).

But given their talent for consumption, why don’t black holes just keep expanding and expanding and simply swallow the Universe? Now, one of the world’s top physicists has come up with an explanation.

more….

Because of conservation of energy. To fall into a black hole requires a loss of energy, and in a vacuum there is no easy way to lose enough energy.

Reply Quote

Date: 19/01/2019 13:18:26
From: mollwollfumble
ID: 1332504
Subject: re: Why Don't Black Holes Swallow All of Space?

Tau.Neutrino said:


Why Don’t Black Holes Swallow All of Space? This Explanation Is Blowing Our Tiny Minds

Black holes are great at sucking up matter. So great, in fact, that not even light can escape their grasp (hence the name).

But given their talent for consumption, why don’t black holes just keep expanding and expanding and simply swallow the Universe? Now, one of the world’s top physicists has come up with an explanation.

more….

I have a huge amount of respect for Susskind, a very great amount more than for Hawking.

I keep meaning to buy Susskind’s books, by the way.

I particularly like his ER = EPR.

But is this new work a step too far? Using anti-de-Sitter theory to show that the space within a black hole must be expanding. The original de-Sitter theory way way back showed that it was impossible (in the absence of a cosmological constant) for the universe to be static, it had to be either expanding or contracting. So that may tie in with the new paper.

Reply Quote