Black hole that ‘rings’ like a bell shows Einstein was right

Astronomers have looked at the way a black hole ‘rings’ like a bell to test a prediction of Einstein’s general relativity. Turns out Einstein is still right

Source:
https://www.newscientist.com/article/2216409-black-hole-that-rings-like-a-bell-shows-einstein-was-right/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home