RT @esa: Past & present moons – did Saturn’s rings form from a moon that broke apart? @esascience IOW esa.int/spaceinimages/… https://t.co/DhL1XGDRQA
RT @esa: Past & present moons – did Saturn’s rings form from a moon that broke apart? @esascience IOW esa.int/spaceinimages/… https://t.co/DhL1XGDRQA