After thinking about the problems for 10 years, he published the general theory of relativity. In it, he suggested that gravity is not a force, as Newton had believed, but the result of a ...

Albert Einstein's general theory of relativity is one of the towering achievements of 20th-century physics. In our introduction to general relativity, we explain how this theory developed ...

General relativity describes gravitation in a geometrical framework generalizing special relativity and classical mechanics. This term includes theoretical studies of gravity, experimental studies ...

On 25 November 1915, Albert Einstein presented his general theory of relativity at the Prussian Academy of Sciences. This theory is still considered to be the most important idea in modern physics.

Building on Einstein’s theory of general relativity, Novillo's formula calculates gravitational deflection to predict asteroid paths more accurately than ever before. Novillo’s equation isn ...

But why do we care? Black holes are cast-iron predictions of general relativity, Einstein’s peerless theory of gravity, and yet they stretch it to breaking point. General relativity says that ...

Einstein's theory of relativity predicted the presence of ripples ... What's more, when he tried to write a mathematical formula to describe how gravity waves work, he couldn't do it.