Weak Equivalence Principle Confirmed by MICROSCOPE Satellite to 10^-15

[Filip Larsen]

TL;DR Summary

The MICROSCOPE satellite experiment data from 2017 has now been confirmed to verify GR weak equivalence principle to the order of 1 in 10^15.

https://arstechnica.com/science/202...atellite-confirms-weak-equivalence-principle/

The MICROSCOPE team published preliminary results in 2017, showing no signs of violation at a sensitivity of one part in 10¹⁴ over the two and a half years the experiment was in orbit. Now they have analyzed the data even further, confirming those 2017 results and improving the precision to one part in 10¹⁵.

See also http://dx.doi.org/10.1103/PhysRevLett.129.121102 (limited access)