4-Body Problem?
The last three years I've been involved in educating myself on the history of science and physics which has been truly fascinating.
It wasn't until I saw the very good Netflix series 3 Body Problem, based on a series of books by author Liu Cixin, that I first heard of such a thing.
Now astronomers have identified a four body system.
GIZMODO:
Astronomers have identified a rare, tightly bound star system in which an eclipsing binary—two stars that pass in front...