Dark matter, dark energy, the Hubble tension: underpinning these theories is Einstein’s general theory of relativity, which treats space and time as a unified “spacetime” and considers ...

"The singularity is the most mysterious and problematic part of a black hole. It's where our concepts of space and time ...

It mentioned many of his theories. However, the one I kept thinking about is the theory of relativity. My favorite example of this theory is the one in which people are playing Ping-Pong on a train.

For example, the paths taken by planets around the Sun follow geodesics and appear as elliptical orbits. Einstein published a ...

Albert Einstein had described the special theory of relativity in 1905. The result of Einstein's thinking about light, this theory introduced brand-new ideas to science. It opened up an entire ...

Black hole singularities should not exist, according to theories of quantum mechanics. New tweaks to Einstein's equations of ...

Physics has a problem—their key models of quantum theory and the theory of relativity do not fit together. Now, Dr. Wolfgang Wieland from Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU ...

Tara Shears and Jim Al-Khalili – explain why Einstein's theory of general relativity still matters to them. Click or tap on the labels below to discover each physicist's example of why general ...

Einstein’s theory of general relativity explains ... making it difficult to unify them into a single framework. For example, ...

This theory tries to reconcile Einstein’s theory of general relativity (which sees gravity as a warping of spacetime) with quantum theory (which views the universe as being made of extremely ...

Einstein’s theory of general relativity sees gravity as the curvature or warping of spacetime by an object, with more massive objects having a greater effect on the spacetime surrounding them. For ...