Gravity Probe B

"Testing Einstein's Universe"

Announcement / Release
April 20, 2004
December 8, 2010
Birth Place
United States of America


Gravity Probe B was a satellite-based mission which launched on 20 April 2004 on a Delta II rocket. The spaceflight phase lasted until 2005; its aim was to measure spacetime curvature near Earth, and thereby the stress–energy tensor (which is related to the distribution and the motion of matter in space) in and near Earth. This provided a test of general relativity, gravitomagnetism and related models. The principal investigator was Francis Everitt.

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