Use the Yahoo search with the key words 'gravity probe B',you can find out more informations about it.|||Gravity Probe B will confirm Einstein's prediction on spacetime curvature near Earth, and thereby the stress-energy tensor (the distribution, and especially the motion, of matter) in and near Earth.
Initial results has already confirmed the expected geodetic effect to an accuracy of about 1%. However, the expected frame-dragging signal has been measured in magnitude equal to the current noise level; hence, further data analysis will be required.
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