The longest-running project in NASA’s history has completed its mission. Gravity Probe B has finally confirmed that the Earth drags spacetime around as it rotates like a spoon twisting in a jar ...

NASA's Gravity Probe B (GP-B) mission has confirmed two key predictions derived from Albert Einstein's general theory of relativity, which the spacecraft was designed to test. The experiment ...

Gravity Probe B — a NASA mission to test two important predictions of Albert Einstein's Theory of General Relativity — launched Tuesday, April 20.

The payload is made up of the dewar, the key structural component around which the GP-B space vehicle was built, and the flight probe, a nine-foot-long cigar-shaped vacuum chamber.

Despite the modest name, Gravity Probe B carries a payload of superlatives. It has taken longer to finish than any other project at the National Aeronautics and Space Administration.

NASA researchers spent nearly 40 years on Gravity Probe B, a satellite designed to test some of Albert Einstein's theories. As the $700 million project winds down, NASA is rejecting a request for ...

A NASA probe orbiting Earth has confirmed two key predictions of Albert Einstein's general theory of relativity, which describes how gravity causes masses to warp space-time around them.

Gravity Probe B was put in space to confirm two important consequences stemming from Einstein's Theory of General Relativity - his description of gravity.

Gravity Probe B will be placed into a transportation canister on Tuesday, Nov. 18 and transported to Space Launch Complex 2 the following day on Nov. 19.

WASHINGTON — NASA’s Gravity Probe B (GP-B) mission has confirmed two key predictions derived from Albert Einstein’s general theory of relativity, which the spacecraft was designed to test ...