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

Once again, physicists have confirmed one of Albert Einstein's core ideas about gravity — this time with the help of a neutron star flashing across space. The SEP has appeared to be true for a long ...

The rapid expansion of the universe has been the most perplexing enigma in physics. To unravel this cosmic puzzle, scientists turn to the fundamental laws of physics, including Albert Einstein's ...

A century after Albert Einstein sketched out his radical picture of gravity, astronomers have now watched a black hole ...

Einstein’s theory of gravity — general relativity — has been very successful for more than a century. However, it has theoretical shortcomings. This is not surprising: the theory predicts its own ...

An extreme pair of superdense stars orbiting each other has put Einstein's general theory of relativity to its toughest test yet, and the crazy-haired physicist still comes out on top. About 7,000 ...

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

A century ago, Albert Einstein became famous. Sure, he was already well-known among physicists. But the world at large learned his name only after November 1919, when news broke that his theory of ...

Albert Einstein’s theory of general relativity has been remarkably successful in describing the gravity of stars and planets, but it doesn’t seem to apply perfectly on all scales. When you purchase ...

Gravity plays tricks on our telescopes. Take a Hubble Space Telescope image released by the European Space Agency on August 9, 2021. At the center of the image sits a ring of light punctuated by four ...

The theory of gravity proposed by Albert Einstein nearly a century ago can explain the dance of galaxies around one another just as well as it can model the motion of planets around the sun, according ...