NASA Gravity Probe B Mission Ready To Test Einstein's Theory

NASA Gravity Probe B Mission Ready To Test Einstein's Theory: "Gravity Probe B, a NASA spacecraft to test two predictions of Albert Einstein's general theory of relativity, achieved a major milestone last week with the completion of the first phase of its mission and the transition into the science phase. The GP-B mission is now one step closer to shedding new light on the fundamental properties of our universe."