Source
More or less, we have all heard about black holes, regions of space in which there is such a concentration of mass, that it generates a gravitational field so large that nothing that falls inside it can come out again, not even light.
Just as black holes are a solution to Einstein's equations, the solution of white holes could also be obtained from these equations, although none has yet been discovered and even few scientists believe that they can exist.
If black holes are gravity wells that draw all the matter and energy that surrounds them into it, white holes would be stellar objects that would expel matter and energy.
Source
To explain the formation of black holes, there is a well-known physical process, when a large-mass star ends its nuclear fuel collapses, shrinking to reach a few tens of kilometers in diameter but with the same mass.
On the contrary, for white holes no one has yet been able to imagine a solution for its formation, although several theories are proposed, such as, for example, that these white holes are the output of black holes.
This by definition looks like a wormhole or Einstein-Rosen bridge, which have also not been discovered yet but which would allow us to move between regions of space-time too far away to do it in a conventional way.
Source
Some have even dared to suggest that the big-bang could have arisen from a white hole arisen from the black hole of a parallel universe.
Undoubtedly, if these wormholes existed, it would be a great way to travel through space without being affected by the speed limit of light, but at the moment, they are just a nice dream and maybe we will never see one.
Although, they said the same about black holes and now it turns out that there are thousands of them only in our galaxy ...
Versión en español
@tipu curate
Upvoted 👌 (Mana: 0/32)
No matter what we call it, the big bang caused massive eruption of energy and matter... One could argue that when black hole absorbs more than critical amount of matter and energy, it will turn into what you called white hole... It will expel all that it has absorbed.
I don't think anyone knows how much is the critical mass of a black hole, but for everything there is arguably such mass.
Thank you for your comment.
@mauromar their are possibility of every thing, because this universe is very big and we have not seen a percentage of it also. If their are Angels and demon. White hole is a small thing.
Thanks for your comment.
Fasinating... I love thes topics on space!! unfortunately since its just entertainment value don't follow it much as a grown aging adult who is not a scientist!!
it was damn thrilling - worm holes, space, time, blackhole and I want to see MEN IN BLACK NOW!!
Hi @mintymile, there are tons of beautiful documentaries on youtube about this.