Black hole, White hole and Warm hole: what are these exactly and how are they related?

A black hole is a region in space with such intense gravity that nothing, not even light, can escape.

This extreme gravity results from an enormous amount of mass compressed into a tiny volume, like when a large star collapses at the end of its life.

The boundary beyond which escape is impossible is called the event horizon.

A white hole is a hypothetical region of spacetime, often described as the opposite of a black hole.

Unlike black holes, which attract matter and light and from which nothing can escape, white holes are thought to emit matter and light but not allow anything to enter.

While predicted by Einstein's theory of general relativity, there is currently no observational evidence to support their existence.

Like black holes, white holes are thought to possess a singularity (a point of infinite density) and an event horizon (the boundary beyond which escape is impossible, but in this case, only to the inside).

Some theories suggest that white holes could be connected to black holes through wormholes, creating a "bridge" between different points in spacetime.