After 40 years of effort, frustrating delays and budget battles between NASA and Congress, Stanford scientists are finally ready to test whether Albert Einstein got it right when he published his ...

PORTOLA VALLEY, Calif. — It’s a light show in space unlike any other. For the first time, scientists have detected light from behind a black hole, and it fulfills a prediction rooted in Albert ...

Is Einstein’s general theory of relativity correct? Testing two extraordinary predictions of that theory is the goal of Gravity Probe B, or GP-B, a satellite that just marked its first anniversary in ...

“The chief attraction of the theory lies in its logical completeness,” wrote Albert Einstein after publishing his general theory of relativity in 1915. “If a single one of the conclusions drawn from ...