Comments on: How Does Gravity Escape a Black Hole?

By: Joe Blow

Joe Blow — Wed, 16 Jan 2019 00:00:37 +0000

Time to update this, gravity waves have been detected. Woohoo science! 😛

By: Andrew Hooper

Andrew Hooper — Sat, 13 Oct 2018 20:05:00 +0000

I very much appreciated the above explanations. Questions of my own are:

How does mass distort space time? What is an atom doing to communicate with its surroundings? If spacetime distortions generate potential energy between two objects where does the energy come from?

Many thanks.

By: Turbo Cayman

Turbo Cayman — Fri, 07 Sep 2018 23:07:49 +0000

Obviously, we don’t yet understand the gravity of the situation. But the math seems to be working… at least today; as spooky action at a distance cancelled out!

By: MrGonzonator

MrGonzonator — Sun, 02 Sep 2018 15:44:43 +0000

Spitballing here… If black holes are gravity windows into other universes, could dark matter simply be the influence of gravity from other universes being felt through the black holes into our universe? When close to the black hole gravity is dominated by it, but further away the influence of the mass of potentially many universes on the “other side” of the black hole make themselves felt. Since the gravity could only be felt in the direction of the black hole itself would this translate to a “extra mass” observed at a distance?

By: astrotrf

astrotrf — Sat, 11 Aug 2018 14:42:14 +0000

There’s a good PBS Space Time video “The Speed of Light is NOT About Light” on YouTube that covers this topic well. Briefly, the speed limit is the speed of causality — the maximum speed at which any two parts of the Universe can communicate.

By: Malcolm Storey

Malcolm Storey — Thu, 28 Jun 2018 12:11:18 +0000

It’s a basic property of this Universe. The velocity at which information travels (presumably the velocity with which the resolution of quantum events is propagated).

By: Marek Štítek (@m_stitek)

Marek Štítek (@m_stitek) — Sat, 02 Jun 2018 16:04:14 +0000

Are there any theories or hypothesis that would explain the origin of this limit? Where is it coming from?

By: Brian Koberlein

Brian Koberlein — Sat, 02 Jun 2018 15:36:21 +0000

You could call it something like the speed of action. It is a relativistic limit that light and gravitational speed both follow.

By: Marek Štítek (@m_stitek)

Marek Štítek (@m_stitek) — Sat, 02 Jun 2018 15:33:02 +0000

I’m wondering about the definition of speed of light. Given that it’s the gravity and spacetime itself that is the playground for everything, is it safe to say that the speed limit, we know as speed of light, is actually a property of spacetime and light is just another victim of it as any other particle? Therefore, wouldn’t it be better to call it a speed of gravity? Otherwise, it seems very counterintuitive that the gravitational waves (which have been detected) are subject to a speed limit given by a speed of light.

By: Cezary Czerniakow

Cezary Czerniakow — Fri, 04 May 2018 22:52:22 +0000

Ok. energy of several sun masses was released in two black hole merger in matter of miliseconds. Well, where is this energy now? It is appear as space distortion, but what happened? Can space and time without material objects conserve/hold energy? How? Or somehow everything (material objects) is slightly warmer and photons slightly changed color?

By: Brian Koberlein

Brian Koberlein — Wed, 04 Apr 2018 19:42:51 +0000

Semiclassical physics can give us an idea of how things work, even without a complete theory of quantum gravity.

By: Gary L Mathis

Gary L Mathis — Wed, 04 Apr 2018 18:41:31 +0000

General Relativity is not QM compliant and, so, is almost certainly wrong.