Wobbling exoplanet hints at a hidden exomoon so massive it could redefine the word 'moon' altogether
January 23, 2026
A gas giant planet beyond the solar that wobbles as it circles its star, hinting to astronomers that it is orbited by its own moon. To make this suspected discovery even more remarkable, if this moon exists it would be absolutely massive, comparable to around half the mass of Jupiter. That would make it thousands of times more massive than any moon orbiting a solar system plane — so massive…