A white hole is a theoretical concept in astrophysics, described as the reverse of a black hole. While black holes pull matter and light into an inescapable singularity, white holes expel matter and energy, preventing anything from entering.
Predicted by Einstein's equations of general relativity, white holes remain purely hypothetical, with no observational evidence to confirm their existence. Some theories link them to the Big Bang or wormholes, but they primarily exist as intriguing ideas in theoretical physics.