Cassini's deep dive through a geyser plume on Enceladus

As the long-lasting and spectacularly successful Cassini mission to Saturn winds down, its controllers are getting more daring. Today, on a very low, very fast pass, Cassini will fly directly through a geyser plume erupting from Saturn's moon Enceladus. The plume is thought to consist of salt water spray from a warmish ocean hidden beneath the moon's icy crust--- but that's what today's surface-skimming flyby will try to find out. More: http://saturn.jpl.nasa.gov/mission/flybys/enceladus20151028 http://saturn.jpl.nasa.gov/news/cassinifeatures/feature20151026/ http://solarsystem.nasa.gov/finalflybys