A satellite that will put Albert Einstein's theory of general relativity to the test has been launched successfully into space. (..) It will carry four near-perfect spheres in gyroscopes to help verify two key elements of Einstein's theory. The probe will align itself with its "guide star" IM Pegasi, so that the spin axes of the spheres point to this star. Over the course of the year their spin axes will be monitored for tiny changes that could be caused by the effects Einstein described. (See the whole article here.) Fascinating. I'm eagerly awaiting the results - after all, the most important scientific theories tend to undergo significant changes every hundred years or so... Has any of you heard anything more about this experiment?