The bold question-askers at What If imagine the cosmic consequences of a collision between a black hole and a white hole.

White holes are theoretical cosmic regions that are opposite to black holes. Just as nothing can escape a black hole, nothing can enter a white hole.

The major difference between black holes and white holes is their formation. We know, thanks to the work of J. Robert Oppenheimer and collaborators, that when a massive star undergoes a complete ...

White holes are like cosmic one-way fountains, hypothetically vomiting out energy and matter while refusing to let anything in. But so far, they exist only in equations and sci-fi dreams, ...

White holes would be even stranger than black holes. They would still have singularities at their centers and event horizons at their borders. They would still be massive, gravitating objects.

Teams of astronomers at Meyer's university and many other institutions have been keeping an eye on the black hole ever since. The vigilance paid off when, in April 2023, a team at the university ...

At the moment, white holes are theoretical mathematical concepts that astrophysicists use to help further study black holes in space. To study a black hole, scientists mathematically explore the ...

White Holes, like Rovelli's other works, is remarkably short — less than 200 pages. But the clarity of his explanations is unparalleled. As a scientist who is also a popularizer, ...

A white hole is a black hole in reverse. Instead of absorbing all matter, energy and light outside of it as a black hole does, a white hole emits matter, energy and light, and cannot be entered from ...

There is — via the child white hole. If you buy something through a link in this article, we may earn commission. About. Engadget Masthead About our Ads Advertise Licensing FAQ RSS Feed.

Of course, white holes are not a new idea, and were first proposed way back in the 1930s. But what little we know about black holes the same can be doubly said for white holes.