The Cassini spacecraft will fly into mysterious icy plumes erupting from Saturn's moon Enceladus on Wednesday. The flyby, the spacecraft's closest approach to any object so far, could shed light on whether a liquid water ocean – and possibly life – lies beneath the moon's icy surface. In July 2005, Cassini flew within 175 kilometres of Enceladus's surface, discovering a dozen or so jets spraying water vapour and ice crystals out of warm fissures near the south pole. (source: space.newscientist.com)
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