... Europa's Ice Rafts . ... The surface of Jupiter's moon Europa has shifted. ... Pieces of Europa's surface, identifiable above, have rafted to new locations. Oceans Under Jupiter's Europa? ... Comet Hale-Bopp Over New York City . ... The center of nearby giant galaxy M87 is a dense and violent place. ... Does a comet's dust tail always orbit behind it? ... In its trek through the inner Solar System, Comet Hale-Bopp has passed nearly in front of the Andromeda Galaxy (M31), seen on the lower left. ...