There are two aspects of Einstein's theory of gravity. The first aspect is the geodetic effect, the effect of bending of space and time around the gravity objects, like planets. The second aspect is the "frame dragging", which is the amount of space and time structure carried by the object rotates.
To test the theory of the German-born scientist, NASA's Gravity Probe B sent to orbit the Earth. The aircraft was equipped with a device called a "star tracker" to follow a star named IM Pegasi. If the geodetic effect and frame dragging does not exist, star trackers should always be locked with a star forever.
If Einstein is correct, the direction of rotation Gravity Probe B will change little by little due to the mass and rotation of the Earth. Everitt menganalogikan this effect with the ball rotates in the honey. "Honey and objects which are also located in the honey will be dragged," said Everitt.
By analyzing the data, the team found changes in orientation miliarcsecond 6,600 a year-1 miliarcsecond, said Everitt, sehelah equal to the width of a human hair seen from a distance of 16 kilometers. Very small changes that may be too difficult to show Einstein himself. In his book The Meaning of Relativity, Einstein wrote, "frame dragging effects emerge based on our theory, although its level is very small so the proof with some laboratory experiments what to do."
Proof of this can make scientists understand some of the events in the universe. "Measuring the effects of frame dragging due to the rotation of the earth have big implications," says physicist Clifford Will of Washington University in St. Louis who was not involved in the research.
For example, he said, dragging the frame seems to have a role in triggering the explosion energy of quartz, a very distant galaxies that are actively involved in the black hole.
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