Scientists outline how spacecraft could reach a nearby black hole within a century
A speculative mission concept proposes sending laser-powered, gram-scale spacecraft to a black hole that could potentially exist within…
Einstein’s Gravity Just Passed a Strange New Quantum Test
A new experiment found that a falling quantum wave behaves just as Einstein’s equivalence principle predicts. The result…
Astronomers confirm Einstein’s gravity by viewing light from behind a supermassive black hole
Astronomers detected delayed X-ray flashes consistent with light reflected from the far side of an accretion disk and…
Scientists Find a New Way To Hear the Faint “Ringing” of Black Holes
When two black holes collide and merge, they release gravitational waves. These waves can be detected by sensitive…
‘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…
‘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…
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…