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 is one of the longest-running NASA projects ever. It started in 1963, before men walked on the moon. It took five decades to develop the technologies to build gyroscopes sensitive ...

Gravity Probe B used superconducting quantum interference devices (SQUIDs) to measure tiny changes in the orientations of four perfectly-spherical, quartz gyroscopes as the experiment orbited the ...

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.

Despite this setback, in 2007 the Gravity Probe B team confirmed one prediction of general relativity. According to Einstein, the Earth’s gravity warps spacetime like a bowling ball on a trampoline.

All Systems Go On Gravity Probe B Date: April 30, 2004 Source: NASA/Marshall Space Flight Center Summary: In its first week on orbit, Gravity Probe B has achieved many successes that will ensure a ...

It took 44 years to build, and it’s designed to resolve one of the most intriguing questions in science: whether Einstein was right about the universe. Now circling Earth, Gravity Probe B is ...

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 ...

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 ...