Anti-Blackhole?

Question

We know that in the Universe there is an opposite to everything. Antimatter, a positron. EVERYTHING has its opposite.

My question is, can it be possible to have a "Whitehole", that is an infintesimal point which repels everything with the force. What does this mean? And if it does exist, is it opposite to a blackhole? Do we enter a blackhole and come out of a white hole, is this simply a wormhole?

I know that we can't 'know' this answer, just a bit of theoretical physics. What do you think?

Answer 1

No such thing as Anti-Gravity...

As such, you can't have an Anti-Blackhole expelling energy and matter...

The opposite to infinately Dense points in space then becomes Absolute Void or empty points. Those do exist...

Edit:
One of the other answers mention that they think "White Holes" need to exist to conserve energy and obey thermo dynamics... This is not so. All the matter and energy that enters a Blackhole is conserved by adding to the total value of the singularity. The only thing that is lost is the imformation that matter and energy held, since the atoms are crushed and the energy is (effectively) solidified with the stopping of time at the event horizon.

Edit #2:
One of the Answers below mentioned that the "Big Bang" was an expansion from a singularity and might qualify as an example of an anti-Blackhole.

At this time, we have no valid way to suppose what happens in a Blackhole beyond the event horizon -- How ever, it is my personal belief that our Universe is but a single level in a Multi-Universe system where each Universe is contained within the Singularity of the Blackhole existing in another Universe. As such, the event Horizon acts as a barrier between the parent Universe and the off-spring Universes.
Now we know that the Singularity of a Black Hole is infinately small, in such a manner that all the matter inside of it is continually falling away from the event horizon and never drawing closer to each other, but rather getting further and and further away from each other... Not unlike the expansion we observe in our own Universe and the space between galaxies... In short, what we obseve as an outward expansion in our Universe may infact be the inward expansion of Black Hole singularity when observed in another Universe... But now we're crossing the cusp of Theory into the realm of Science Fiction... Still, there's no proof either way, and it explains why the "Big Bang Singularity cast matter in all directions with enough momentum to over come the gravity and colapse.

Answer 2

There is most definitely a "white hole" in theoretical cosmology/general relativity. The math behind it is called Schwarzschild geometry. The complete Schwarzschild geometry consists of a black hole, a white hole, and two corresponding universes connected at their horizons by a wormhole. The problem is that while general relativity allows for white holes, the second law of thermodynamics (entropy increasing in time) does not. The link below explains this with some nice graphics.

Answer 3

I don't know physics that well but if I remember correctly, wouldn't the big bang theory be the opposite of a black hole because it repels everything?

Answer 4

well, i think it's possible. after all, one of the laws of motion states that energy cannot be created or DESTROYED, it can only be changed from one form to another. So, what happens it when it enters a black hole?