Einstein’s claim that the speed of light is constant has survived more than a century of scrutiny—but scientists are still ...

As new and powerful telescopes gather fresh data about the universe, they reveal the limits of older theories like Einstein's relativity. When you purchase through links on our site, we may earn an ...

This is the first time that disk-jet co-precession has been clearly observed in a black hole system, which is truly exciting, ...

A bizarre "cosmic glitch" in the theory of how the gravity of the universe works may have been mended. The strange glitch in Einstein's description of gravity in his theory of general relativity may ...

Astronomers have finally watched a black hole do something Albert Einstein only described on paper: twist the very fabric of ...

Researchers have explored the interplay between gravitational effects and quantum interactions in optical atomic clocks, revealing more about quantum entanglement in precision timekeeping. For over a ...

Quantum theory and Einstein's theory of general relativity are two of the greatest successes in modern physics. Each works ...

Astronomers have seen spacetime itself wobble near a spinning black hole for the first time. The discovery, revealed during a star’s destruction, confirms a major prediction of Einstein’s theory of ...

Time dilation. Length contraction. The fact that time moves faster at your face than it does at your feet. These are all experimentally verified consequences of the Special Theory of Relativity, ...

Long and winding road: The Juice space probe taking the long way to Jupiter and its moons - Copyright NASA/AFP/File NASA Long and winding road: The Juice space probe ...