Gravity Probe B launch

Numéro d’image : 11887424
Gravity Probe B launch
Launch of Gravity Probe B satellite (GP-B). This NASA probe was built to test Einstein's General Theory of Relativity. It was launched on a Boeing Delta 2 rocket at Vandenberg Air Base,California,USA,at 1657 GMT on 20 April 2004. The ascending rocket is leaving a trail of exhaust gases. The probe contains four gyroscopes,each just under 4 centimetres wide,and each containing a spinning metal sphere. The probe will orient itself with a guide star using a telescope. During the year the probe spends in its polar orbit,it is predicted that the warped space-time around the rotating Earth will drag the gyroscopes out of position. The probe was built by Stanford University,USA
Licence : Droits gérés
Crédit: Science Photo Library / Stanford University
Taille de l’image : 1536 px × 1848 px
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