Theory of Relativity in Space: Latest science, tests and images

The three architects of supergravity are getting some high-profile recognition, more than four decades after they developed the influential theory.

Discovery of this black hole disk could provide insights regarding relativity theory.

While it's tough for humans and spaceships to travel near light speed, tiny particles do it all the time. Here are three ways that's possible.

One hundred years ago today, in the wake of the first World War, a British astronomer watched a solar eclipse for signs that a German physicist may have been right about warps in the universe.

A dancer gliding across a stage was so well synced with the projection around him that the performer appeared to trigger ripples coursing through the fabric of space-time.

The botched launch of two global-positioning satellites four years ago has proven to be a real gift to physicists.

Once again, a decades-old theory of gravity has survived a modern scientific onslaught. Einstein wins again.

The discovery of wobbling "hotspots" circling the drain of a massive black hole offers exciting new evidence for the behemoth that lies at our galaxy's center.