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Originally Posted by astromark
As to red shifting light photons... If they are all escaping at light speed, then no red shift would be seen. There is no velocity difference. For the sake of this thought I do not think A White Hole has a event horizon. By definition its the opposite of a Black Hole. I can not see one of these things existing for more than a nanosecond. Leading me to questions like; Does a supper massive black hole ever reach a point where it just overcomes its own gravity mass and explodes in a most spectacular energy eruption.?
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Just a slight correction. A white hole is not by definition the opposite of a black hole. In fact white holes and black holes may be the same thing.
A white hole has the same gravitational pull as a black hole so by that fact alone I would find it hard to distiguish between the two as stuff would be sucked into a white hole in the same way they are sucked into a black hole.
I believe the definition is that a white hole is a time reversal of a black hole. Which using that definition would clearly show that it has a gravitational effect exactly equal to a black hole.