According to Special Relativity, infinite densities are forbidden because that would require an infinite energy, or equivalently that a material object can travel at the speed of light in vacuo. This is easily seen as follows. Consider a cuboid rest-mass m0 of sides length x. Let it move with constant rectilinear velocity v in the x-direction. Its mass is given by


m = m-sub-o
-----------------
√(1 - v2/c2)



and its volume is given by
V = (x^3)(1 - v2/c2)^1/2.
So the density D of the moving mass is


D = m-sub-o
--------------------
x^3(1 - v2/c2)




which is infinite when v = c: but this is forbidden by Special Relativity since no material object can travel at the speed of light in vacuo. So infinite densities are forbidden by Special Relativity. Now the so-called "point-mass" has a finite mass and a zero volume, so that it is infinitely dense, which is what the singularity of the alleged black hole is supposed to be. Thus, if General Relativity permits point-masses it does so in violation of Special Relativity. Yet General Relativity is supposed to be a generalisation of Special Relativity to non-uniform motion. It cannot therefore violate Special Relativity. So if General Relativity is to be consistent with Special Relativity, it cannot permit point-masses, howsoever they are alleged to be formed, despite what Prof. Mr. Krasinski et al. might otherwise and vagariously claim.

Relativity fails to explain black holes. This is nothing new, and certainly doesn't mean that they don't exist. Science may get to a point where we have to rethink singularities.

Straight from wikipedia:
The appearance of singularities in general relativity is commonly perceived as signaling the breakdown of the theory. This breakdown, however, is expected; it occurs in a situation where quantum mechanical effects should describe these actions due to the extremely high density and therefore particle interactions. To date it has not been possible to combine quantum and gravitational effects into a single theory. It is generally expected that a theory of quantum gravity will feature black holes without singularities.

You are supposed to use quotation marks; otherwise you are guilty of plagiarism.
http://www.sjcrothers.plasmaresources.com/Ricci.html

damn...lol just took a shit on that kids life

op why didnt you just copy pasta the rest of the page as well

damn i didnt understand a word nah mean

Maths...

Black holes exist, because they warp space-time in a way that even light, which travels at the same speed as gravity, cannot escape it.
Light going down a toilet bowl of gravity is the best example that I can give.

This post was edited by L4d on Oct 19 2011 08:11am

Pretty sure the theory of relativity got violated like a vietnamese prostitute this year.

I neglected to state that there is supposedly a massive black hole in the center of the Milky Way, which everything in the Milky Way revolves around.
A black hole is the only thing that scientists can think of that would not be seen and make everything revolve around it.

What if at some point nothing ever exists again?

Like it all gets swallowed up by a black hole or something.