  urlLink Wired News: Probe Set to Test Einstein Theory "Probe Set to Test Einstein Theory NASA's Gravity Probe B spacecraft could begin testing Einstein's general theory of relativity as early as this week, according to mission controllers at Stanford University.
The probe, said to be one of the most precise scientific instruments ever assembled, was initially scheduled to begin taking measurements within 45 to 60 days of its April 20 launch into Earth orbit. But mission controllers were forced to delay operations time and again after discovering minor malfunctions in the spacecraft's microthrusters and observing unexpected behavior from its four gyroscopes. " 
