New findings reported from University of Pisa describe advances in physics.

Physics Week | August 11, 2008 | Copyright

"We consider the possibility of testing the equivalence principle (EP) in the gravitational field of the Earth from the orbits of LAGEOS and LAGEOS II satellites, which are very accurately tracked from ground by laser ranging. The orbital elements that are affected by an EP violation and can be used to measure the corresponding dimensionless parameter eta are semimajor axis and argument of pericenter," scientists in Pisa, Italy report.

"We show that the best result is obtained from the semimajor axis, and it is limited-with all available ranging data to LAGEOS and ...

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