Gravity Probe B has finally confirmed that the Earth drags spacetime around as it rotates like a spoon twisting in a jar of honey, mission scientist announced at a May 4 NASA press briefing.

Scientists are about to send a probe into orbit around Earth to prove -- or disprove -- Einstein's general theory of relativity. Join NPR's Ira Flatow for a look at the Gravity Probe B mission.

NPR's Alex Chadwick talks to NPR's David Kestenbaum about the U.S. space agency's scheduled launch Monday of Gravity Probe B, a major experiment that will test Einstein's theory of relativity.

NASA's Gravity Probe B mission has blasted off successfully and has begun a 44-day period in which it gears up to test Einstein's theory of gravity with exquisite precision. The three-tonne probe ...

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 ...

Engineers have designed a compact, battery-powered radio probe that could help unlock the secrets of alien planets. The proposed small probe, known as the Gravity Imaging Radio Observer (GIRO ...

It recommended that Gravity Probe B receive no additional funding after its current funding runs out in September. Launched in 2004, the satellite used four precision-engineered gyroscopes to ...

The proposed small probe, known as the Gravity Imaging Radio Observer (GIRO), would use gravity fields to precisely map the interiors and compositions of exoplanets and other celestial bodies.