Before I read your question, I had never heard of a white hole. So, I scampered over to my friend Vivienne Baldassare to find out more. She’s an astrophysicist at Washington State University. She told ...

If black holes trap everything, what if there were something that did the exact opposite? Enter white holes, the hypothetical cosmic phenomena that might expel matter and energy instead of absorbing ...

White holes, the theoretical opposites of black holes, exist only in mathematical equations—at least for now. They emerge naturally from Einstein’s general relativity, yet defy physical intuition by ...

Size matters when it comes to telescopes. The bigger they are, the farther they can see. Prioritizing constructing large ones is therefore high on the priority list for many observational ...