What Does It Take to Be a Moon?
When you buy through links on our site , we may gain an affiliate charge . Here ’s how it works . From Earth ’s rocky , pockmarked planet to ice - covered ocean man , oursolar systemis chock - full of synodic month . Some planet have dozens of them ; others do n’t have any . astronomer witness these satellites very interesting — geologically and , potentially , astrobiologically — and are eager to commit investigation to gossip lunar destinations , such as Jupiter ’s moon Europa and Saturn ’s moon Enceladus ....