Physicists say that when black holes reach the end of their lifespan, they explode into “white holes” and release all of their matter into space.
If true, the theory could help put to rest the debate over whether or not black holes actually destroy the matter they end up devouring.
The theory suggests that the transition from black hole to white hole would take place right after the initial formation of the black hole, but because gravity dilates time, outside observers would see the black hole lasting billions or trillions of years or more, depending on its size. If the authors are correct, tiny black holes that formed during the very early history of the Universe would now be ready to pop off like firecrackers and might be detected as high-energy cosmic rays or other radiation. In fact, they say, their work could imply that some of the dramatic flares commonly considered to be supernova explosions could in fact be the dying throes of tiny black holes that formed shortly after the Big Bang.
But, what are “white holes“?
White holes are the opposite of black holes, objects into which nothing can enter but are constantly spewing out matter. They were thought to be completely hypothetical, more a mathematical oddity than a real thing…but we may have seen one.
According to Wikipedia, a white hole is a hypothetical region of space time which cannot be entered from the outside, although matter and light can escape from it. In this sense, it is the reverse of a black hole, which can only be entered from the outside, from which nothing, including light, can escape.
However, the basic idea behind them is that the laws of physics aren’t comfortable with things that happen in only one direction. In other words, if black holes exist, then it should be possible to reverse the equations governing them so that you get something that’s reversed but otherwise identical. That’s what a white hole is.
Moving on, as noted by Albert Einstein’s theory of relativity, that when a dying star ends up collapsing under its own weight, at some point the collapse becomes irreversible and no known source of nature can stop it, resulting in a black hole that consumes light and anything else within its surrounding area.
Although, black holes do slowly leak radiation over time – ultimately draining the black hole completely – this doesn’t account for all the other matter that the dying star has consumed. Many physicists, however, believe that at some stage in this process, quantum-gravity effects should take over, arresting the collapse and avoiding the infinities.
According to physicists Carlo Rovelli and Hal Haggard, a black hole eventually reaches a point where it cannot collapse any further and the internal pressure begins to push outwards. This essentially turns the black hole inside out and expels everything it once consumed back into space.
Scientists, believe that these white holes are created not long after the black hole’s original formation, and we humans can’t see it because gravity dilates time and makes the black hole’s lifespan seem to last for billions or trillions of years. Their current calculation is that it only takes a few thousandths of a second for a black hole to turn into a white hole.
A science writer named, Ron Cowen explained,
If the authors are correct, tiny black holes that formed during the very early history of the Universe would now be ready to pop off like firecrackers and might be detected as high-energy cosmic rays or other radiation. In fact, they say, their work could imply that some of the dramatic flares commonly considered to be supernova explosions could in fact be the dying throes of tiny black holes that formed shortly after the Big Bang.”
However, both Rovelli and Haggard admitted that their theory needs to be tested further with more comprehensive calculations.
via RT Questions