At this point, most people have some idea of what a black hole is. This perilous, hypothetical region of spacetime has become a staple of the sci-fi genre and modern astrophysics. Black holes are extremely massive entities with such strong gravitational fields that nothing can escape from them, including light. So, when mass gets absorbed into the hole- whether it be a planet, a star, or the casual spacefaring astronaut, where does it go?
No one knows. There are plenty of theories concerning the nature of a black holes and the mechanics inside them. Some theories are violent- lots of tearing, crushing, and decimation due to a huge amount of gravity. Others provide hope to the unfortunate person who is being sucked in. One of these theories is the white hole theory.
The white hole is the exact opposite of a black hole: everything can escape and nothing can enter. White holes have lots of mass, but this mass does not come from sucking in matter from surrounding space. White holes spew out material that is sucked up from their black hole twin. The black hole can be thought of as the input point, with the white hole being the output point. These two entities are connected via a wormhole traversing across time and huge distances of space.
The creation of a white hole begins when a dying star has become so massive that its gravity collapses on itself, resulting in a black hole. At the center of an average black hole, it is hypothesized that there exists an infinitely small point containing a huge amount of mass. Sometimes, the cores of stars are spinning when they collapse. This spinning motion results in a rotating singularity that, instead of forming a point singularity inside the black hole, punches through the fabric of space and time to a different location (maybe even a parallel universe) and forms a white hole on the other side.
The white hole continuously collects mass, information and data from what enters the black hole, spewing it all out in a mini “big bang” at its location, in a different time. The doomed spacefarer being pulled into a black hole may not be doomed after all, as long as this person can survive the suction of the black hole, the trip through the wormhole and being blasted out the white hole. It would be a crazy roller coaster ride, at least. Hopefully, that person would have a book to read (or maybe a few) because they probably would not have anyone to talk to in the near future.