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Gravity Probe B To Test Einstein's Theory of Relativity
Washington - Oct 23, 2003 NASA's spacecraft, Gravity Probe B is scheduled to launch from Vandenberg AFB aboard a Boeing Delta II rocket December 6, 2003. The GP-B mission is expected to be approximately 16 months long and its objective is to test Einstein's unverified theory of relativity that states space and time are very slightly distorted by the presence of massive objects. To accomplish this, the mission will measure two factors, how space and time are warped by the presence of the Earth, and how the Earth's rotation drags space-time around with it. The method that took years of intense research to develop will check very precisely, the expected tiny changes in the direction of the spin axis of four gyroscopes contained in the GP-B Space Vehicle as it orbits a 400-mile altitude directly over the poles. The gyroscopes, free from disturbance, will provide an almost perfect space-time reference system. The gyroscope, first invented in 1852 by the French physicist J.B.L. Foucault, was an instrument for studying the Earth's rotation by means of a freely suspended flywheel. Over one hundred years of improvements have made it the defining element in the GP-B satellite. Gravity Probe B is NASA's most thoroughly researched program since the beginning of space exploration. A whole range of new technologies have been invented by physicists and engineers to produce the fine-tuned instruments that make up the GP-B Space Vehicle. Some of the technologies developed for this spacecraft are already being used for other science and engineering projects. So far the question remains, will Einstein's unverified theories be confirmed by Gravity Probe B and Newton's theories be negated? Or will finding more about the space-time continuum provide us with more questions than answers? More will be revealed after GP-B has transmited its invaluable information to us in the next year. Community Email This Article Comment On This Article Related Links Gravity Probe B at Stanford SpaceDaily Search SpaceDaily Subscribe To SpaceDaily Express Nuclear Space Technology at Space-Travel.com
Carina Nebula Dust Pillars Harbor Embedded Stars
Boulder CO (SPX) May 31, 2005Astronomers using NASA's Spitzer Space Telescope have imaged a giant molecular cloud being shredded by howling stellar winds and searing radiation, exposing a group of towering dust pillars harboring infant stars, according to a University of Colorado at Boulder researcher. |
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