Most people have heard of black holes, the vacuum cleaners of the universe, but those same people may not have heard of "white holes." The basic explanation of a white hole is that it's the opposite of a black hole in the sense that light and matter can escape and that it cannot be entered from the outside. That's just the basics. Let's get into the exciting scientific explanations.
If a white hole cannot be entered from the outside, how would matter and light be there in the first place?
The simple way to explain this is that it had to have been there when it was first forming. The complex way to state this is that since matter cannot enter from the outside, it had to have been in the general area before and during the formation of the structure.
Are they, well, real?
No one has proven that yet. There is about a 50/50 chance that they exist.
If they are real, could they be viewed?
Well, since a black hole is invisible and white holes are the polar opposite of black holes, then most likely yes. This is only going by what we know of black holes, though.
Who "came up with" white holes?
No one really came up with white holes. It's rather difficult to explain exactly how this theory came about. Read this article to clear things up. If you do not read/speak English, you can select a language on the bar on the left.
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