Enceladus joins Earth, Titan and comets as one of the only known places where negatively charged ions, which suggest the presence of liquid water, are known to exist according to completed research on data collected by Cassini following dives through the Saturn moon's plumes in 2008 and 2009. The short-lived ions would argue for a subsurface ocean. At right is a picture of the moon's active geysers, first observed by Cassini in 2005.
Wayne
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