Satellite test shows objects in space fall at a rate to within two-trillionths of a percent of each other
(PHYSorg.com Physics)

A team of researchers affiliated with several institutions in France and one in the U.S. has found that objects of different mass dropped in space fall at a rate within two-trillionths of a percent of each other. In their paper published in the journal Physical Review Letters, the group describes their satellite-based physics study and what they learned from it.