Black Holes might be mind-bending enough, but what if I were to tell you there was an opposite to them? That might be pretty hard to compute, even for Google. Well yes, they do exist, and they are truly strange. This article will tell you the basics on this strange physics topic.
Basically, a white hole is a theoretical region of spacetime that, instead of pushing matter in, pushes matter out. But that's not all you need to know, since you can't enter from the outside but you can enter from the inside. It is predicted that within every black/white hole there his a wormhole to another part of the universe, so that's where matter enters.
Any matter unfortunate enough to fall into a white hole would never reach the event horizon, but past white holes will eventually become black holes, so, in some sort of time warp, you would fall into the future black hole's event horizon.
Imagine a gravitational field without a surface. Acceleration due to gravity is the strongest pulling force to any human body, and since black/white holes don't have a surface, gravitational acceleration increases a lot. So, in the common tongue, you get turned into a giant floating pile of human spaghetti.
Whoa! Slow down with the crazy physics, Science With Speed! Can we just get a nice, smooth history of white holes?
OK, if you really want. The idea of white holes was first put forward by Russian cosmologist Igor Novikov as a start to the solution of the Einstein field equasions, describing a non-universally black hole with no charge nor rotation. In this space, spacetime would have no edges. Any free-falling particles would actually be travelling through time, unless, that is, if they reach something like an event horizon, which is not possible in Einstein field equasions due to the non-rotation factor. Outgoing particles passing the observer would actually be flying far into the past; possibly removing themselves and the strange black hole. Infalling particles would also take infinity years to reach the even horizon infinity years in the future, which is another law erased by the particle time-travelling thing.
So now we've discovered that white holes truly are strange, and that things in the universe. That venture into theory is possible due to maths, and who knows, maybe in your lifetime a white hole will be discovered.
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