The weak equivalence principle (WEP) is central to Einstein's general relativity. It posits that gravity must accelerate everything equally, regardless of what it is made from. For the first time, a team led by Ming-Sheng Zhan at the Wuhan Institute of Physics and Mathematics has tested the principle using clouds of continuously free-falling atoms aboard an orbiting space station.

来源：https://phys.org/news/2026-09-physicists-weak-equivalence-principle-orbiting.html