General relativity works well for large-scale objects ... For instance, it might explain why black holes don’t collapse, what ...

Despite explaining astronomical phenomena far better, general relativity became deeply unfashionable, as it failed to explain what happens deep inside the atom. Einstein’s big idea was the ...

The accelerating expansion of the Universe, first observed in 1998, remains one of the most profound mysteries in modern physics. It challenges long-standing assumptions about the cosmos and has ...

In our introduction to general relativity, we explain how this theory developed, plus how it explains the motion of the planets, the history and expansion of the universe and the physics of black ...

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

That wasn't just wifely pride. Years before Hubble detected cosmic expansion, Einstein had fashioned a theory, general relativity, that could explain it. In studies of the cosmos, it all goes back ...

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 ...

Over the course of November 1915, the German physicist Albert Einstein gave a series of lectures in which he presented his theory of general relativity. Einstein's ideas explain one of the biggest ...

The first is that Einstein’s general theory of relativity famously makes mass bend space and time – so you’d expect a universe like ours, containing mass, to be overall curved in some way ...