Physicists and Engineers from Stanford University and NASA have combined efforts to create "a relativity gyroscope experiment...to test two extraordinary, unverified predictions of Albert Einstein's general theory of relativity." The Gravity Probe B Experiment uses four gyroscopes orbiting over the earth's poles. The satellites are largely free from disturbance and thus provide "an almost perfect space-time reference system." They hope to measure the warping effects of earth on space and time, and the drag created by the earth's rotation on space and time. The site offers a general interest section with press clips, educational materials, FAQs, and an image library. Along with weekly highlights, a technical interest section supplies information on technology spinoffs, scientific papers, contacts, an orbit timeline, and a link to the ground station.