‘Cosmic Glitch’ could explain why gravity acts differently across the Universe
Einstein’s theory of gravity may behave slightly differently across distances of billions of light-years, with gravity appearing about…
A beam of light can cross the entire universe in no time at all
A photon can cross a billion light-years while accumulating no elapsed time along its path.Special relativity links space…
This Star Is Racing Around the Milky Way’s Black Hole at 8% the Speed of Light
Illustration of a sunlike star passing very close to a supermassive black hole. Credit: ESO, ESA/Hubble, M. Kornmesser…
Black Hole “ringing” could put Einstein’s theory to its toughest test
A newly merged black hole does not become quiet at once. It vibrates, sheds energy through gravitational waves…
New Black Hole Theory Solves a 50-Year-Old Problem
Illustration of a black hole that is growing in response to an influx of energy. New research from…
Astronomers Find a New Clue for Detecting Runaway Supermassive Black Holes
Artist’s rendition of an Active Galactic Nucleus with the accretion disk highlighted. Credit: NASA’s Goddard Space Flight Center’s…
Physicists Devise Black Hole Alternative With a ‘Mini Universe’ at Its Center
Theoretically, black holes emerged from the principles of Albert Einstein’s general relativity (gravity as distortions of spacetime), but…
Time may be an illusion derived from quantum entanglement
Time has always seemed like the one thing physics could count on. Matter changes, stars die, particles flicker…
Wormholes may enable time travel, astrophysicists find
A ring in space, at least on paper, can do something a black hole cannot. It can connect…
Black hole collision lets scientists probe the event horizon for the first time
Black holes do their most important work in hiding. The boundary that defines them, the event horizon, seals…
Wormholes may enable time travel, astrophysicists find
A ring in space, at least on paper, can do something a black hole cannot. It can connect…
Collapsing stars could form gravastars instead of black holes
A black hole is supposed to be the last word in stellar collapse: matter falls inward, spacetime caves…