The "MICROSCOPE" experiment was devised to test Einstein's equivalence principle with 100 times greater precision than had ever been achieved before, the idea that all objects fall in a gravitational field at exactly the same speed. MICROSCOPE consisted of a 402 gram platinum cylinder inside a 300 gram titanium outer cylinder that was in orbit for 2 1/2 years. Any deviations from the equivalence principle would cause the two cylinders to move relative to each other, but no such movement was detected, so any violation of the equivalency principle must be less than one part in a thousand trillion or 10^15. An even more precise satellite, MICROSCOPE-2, is planned to be launched by 2030 and it will test it to one part in 10^18.
MICROSCOPE Mission: Final Results of the Test of the Equivalence Principle <https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.129.121102> John K Clark See what's on my new list at Extropolis <https://groups.google.com/g/extropolis> rwe -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/CAJPayv328_KqSpKr2YXhk2UQKEVBAYWJ-VT%2BC7ssJUt1e2m6ZQ%40mail.gmail.com.
