A newly detected gravitational wave, GW250114, is giving scientists their clearest look yet at a black hole collision—and a powerful way to test Einstein’s theory of gravity. Its clarity allowed ...

Astronomers using the Event Horizon Telescope -- a planet-scale array of eight ground-based radio telescopes -- have identified the likely starting point of a massive cosmic jet in the heart of ...

Black holes are often described as cosmic traps from which nothing can escape, yet modern physics says they are not perfectly black. At their edges, quantum effects make them glow with a faint thermal ...

This puzzle is known as the problem of time, and it remains one of the most persistent obstacles to a unified theory of ...