At 9:57:24 am Pacific Daylight Time on Tuesday, April 20, 2004, the Gravity Probe B spacecraft had a picture-perfect launch from Vandenberg Air Force Base in South-central California. The Boeing Delta ...

Gravity Probe B - a satellite that will check two previously untested predictions of the general theory of relativity - was finally launched today. The $700 million experiment, which is a ...

In its first week on orbit, Gravity Probe B has achieved many successes that will ensure a smooth transition into the science phase of the mission and the best possible experimental accuracy. In its ...

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 Gravity ...

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 preliminary analysis of data from the Gravity Probe B satellite has confirmed that the Earth's mass distorts the fabric of space and time as predicted by Einstein's theory of general relativity.

NASA’s Gravity Probe B will launch aboard a Boeing Delta II rocket at 1:01:20 p.m. EDT (10:01:20 a.m. PDT) Monday, April 19 from NASA’s Space Launch Complex 2 at Vandenberg Air Force Base, Calif.

A grueling but ultimately successful effort to test Einstein’s 100-year-old general theory of relativity has come to a close more than half a century after it began. Twenty-one papers published online ...

One month into the mission, all spacecraft subsystems are continuing to perform well. The spacecraft's orbit remains stable and meets our requirements for next month's transition into the ...

In its first week on orbit, Gravity Probe B has achieved many successes that will ensure a smooth transition into the science phase of the mission and the best possible experimental accuracy. The ...