Singularity Definition and 423 Threads

Consider a light source approaching a singularity (in free fall). As the source approaches the singularity, it is approaching infinite gravity, infinite tidal forces, infinite time-slowing, infinite escape velocity, and infinite red-shifting in zero distance (as seen, or not seen, by outside...

As I understand it, a gravitational singularity is a point where gravitational force is infinite and consequently time stops (from the viewpoint of any outside observer), light from a source at the singularity would become infinitely red-shifted after traveling zero distance (in other words...

When a star of a few solar masses collapses and starts to form a black hole, if the particles of which the star was made get closer and closer together as the density increases, will there come a point at which no force mediating particles have a short enough wavelength to get between the...

Is the event horizon of a black hole (as seen by an observer at rest relative to the singularity) equivalent to the singularity (as seen by a free-falling observer)? In other words, if the stationary observer watches a rocketship free-fall to near the event horizon then turn on its rockets and...

this just out L. Modesto, basically following Bojowald's program and a variant of it started by Husain and Winkler says he has gotten rid of the Black Hole Singularity by quantizing the spacetime model http://arxiv.org/gr-qc/0407097 this is what Bojowald did with the Big Bang...

I have been wondering for some time what a Singularity is, I have read it in various places around this forum but I don't understand. Could someone be so kind to explain that me? Forgive my ignorance, English is not my first language and I am new in all this.

Newton's law of gravity Force = Gm1 m2 / r^2, can be used to calculate the force that the universe as a whole exerts on a particle at its surface, provided a particle on the surface of a sphere containing the entire mass of the universe has a radius greater than 10^ 25 metres (it is currently...

If hadrons carried a new kind of charge that exerted a significant force only over very short distances so that hadrons repel hadrons at close range,this force could stop the formation of a singularity when a massive star collapses. There is no evidence for the existence of such a force...

If a singularity is a point of infinite mass-density, this could mean there is a finite mass in zero volume or an infinite mass in a non-zero volume.Since a black hole does not have an infinite mass, does this mean it cannot have a singularity?

Please read this article: http://www.nature.com/news/2004/040712/full/040712-12.html I can't understand, which it says This suggests that black holes do not actually narrow to a singularity at all I can't understand, please explain :redface:

http://arxiv.org/hep-th/0407115 Loop Quantum Gravity and the Cyclic Universe Martin Bojowald, Roy Maartens, Parampreet Singh 6 pages, 4 figures Notice that Roy Maartens has published over 20 stringy-type papers, mostly on "brane-world" cosmology and brane-related matters. He now...

http://relativity.livingreviews.org/Articles/lrr-2002-1/node3.html Im not sure if an event horizon has actually been observed, the article above talks about "naked singularities", I am wondering if the EH is only hypothetical, or if it is a basic property of BHs

Hello, can anyone help me out here? If you have a function f(z) in U, and b in U, such that b is an isolated essentially singular point for f(z) in U, what type of singularity can g(z) = 1/f(z) have?

The big bang occurred after a singularity evaporated, correct? All that there was in the universe was "in" the singularity. So there was no space for the singularity to have curved. :confused: Also, when space time is curved, in what direction is it curved? or is that relative to the...

Hello all! I come in peace... sort of. :biggrin: As i was watching the anime Neon Genesis Evangelion, where one of the alien characters had the ability to capture its opponents in a Sea of Dirac, which was claimed to stretch over 800 meters in diameter, but had a thickness of only 3...

WHAT is the Singularity?? Is this like the Borg - collective consciousness??

There has been an increase in the resolution of 'singularities'and the problems it brings. here is a link to a very "average" paper at present. The authors(no relation to ''Jeff'' I hope! seem to be grasping in the dark? Nevertheless, issue's are trying to be tackled from a number of...

We know that an ice skater pulling her arms in and spinning faster is an example of the conservation of angular momentum. As stars collapse to become Neutron stars, the rotational period can be as low as 0.001 seconds, again to conserve angular momentum. So what happens to this angular...

All right, physicists claim that mass can be at infinite density. This condition is called the singularity, an one-dimensional point that is having mass (or energy, whatever)inside it. I say mass cannot possibly form singularities. Why? Because of the following: When there is mass inside...

What are your thoughts on the future possibility of a technological singularity -- the creation of superhuman intelligence through technological means (such as artificial intelligence or augmentation of human brains)? This is discussed for example in...

Why does physicist only talk about gravity collpase on stars? Doesn't gravity collapse happen to planets? I mean they do not have any process such as nuclear fusion do repell gravity.

http://www.singularityactiongroup.com Has anyone seen these people before? They seem a tad naive to me. On the front page is this quote: I was under the impression that the Singularity idea did not mean we would know everything, but that our science and tech would be advanced enough that...

I watched a special recently in which there were two black holes observed and there was a single star between them. Instead of doing what a single black hole would do- pull the star into/onto it with it's imense gravity- the star stayed relatively the way it was because the black holes were...