EDN - December 17, 2004

On April 20, 2004, a Boeing Delta II rocket launched from Vandenberg Air Force Base carried Gravity Probe B into orbit and so initiated the next step in a 40-year quest to verify a corollary of the General Theory of Relativity. First conceived in 1960, and initially funded in 1964 but delayed by financial, physics, and implementation challenges, this experiment embodies the ultimate in accurate...

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