Gravity Probe B Scientists are about to send a probe into orbit around Earth to prove -- or disprove -- Einstein's general theory of relativity.

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.

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 ...

But Gravity Probe B measured them both. The results will be published in Physical Review Letters. The spacecraft orbited Earth for 17 months carrying four pingpong-ball–sized gyroscopes.

NASA's Gravity Probe B project has finally mated its instrument to its spacecraft and shipped the assembly off for environmental testing. The experiment, designed to measure two predictions of the ...

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 ...

Gravity Probe B The Gravity Probe B (GP-B) satellite is a collaboration between NASA and Stanford University and was launched in 2004 with an aim to study two effects predicted by general relativity, ...

Gravity Probe B is designed to prove Einstein’s theory of general relativity (known in the business as GR), a concept that stunned the scientific world when it was first proposed in 1916.

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.