Photo composite of suspected water plumes on Europa
This composite image shows suspected plumes of water vapour erupting at the seven o'clock position off the limb of Jupiter's moon Europa. The plumes, photographed by Hubble's Imaging Spectrograph, were seen in silhouette as the moon passed in front of Jupiter. Hubble's ultraviolet sensitivity allowed for the features, rising over 160 km above Europa's icy surface, to be discerned. The water is believed to come from a subsurface ocean on Europa. The Hubble data were taken on 26 January 2014. The image of Europa, superimposed on the Hubble data, is assembled from data from the Galileo and Voyager missions.