Black holes trap everything including light, white holes hypothetically expel matter, and wormholes could connect distant regions of space-time as tunnels through the cosmos.

(via Sabine Hossenfelder) White holes are theoretical bodies in physics that are basically time-reversed black holes, meaning instead of permanently trapping matter inside themselves, they release it ...

Scientists have created an optical device capable of mimicking black holes and the still hypothetical white holes. This system could revolutionize our understanding of the Universe and lead to ...

Ten years after the first gravitational wave detection, a new suite of instruments has captured distinctive ringing signals before and after a black hole merger.