"In our solar system, the most massive moon is Ganymede, which is still extremely small compared to what we are inferring ...

Astronomers have yet to find irrefutable proof for any natural satellites of exoplanets—so-called exomoons—but as circumstantial evidence accumulates and the list of candidates grows, the discovery of ...

Learn how researchers may have discovered an exomoon about 635 light-years away orbiting gas giant exoplanet WASP-4b. Credits: NASA/JPL-Caltech An AI deepfake was final straw for a Washington state ...