Gravity Probe B Rescheduled for April 17 Launch
Gravity Probe B, the often delayed, $700-million experiment designed to test Einstein's general theory of relativity by measuring the predicted tiny deflection of spinning gyros caused by Earth's rotation, is now set for liftoff from Vandenberg AFB, Calif., at 10:09 a.m. Apr. 17 on a Boeing Delta II...
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