Saturn moon delights and baffles

"Cassini discoveries at Enceladus include:

presence of a strange atmosphere concentrated at the south pole

atmosphere mostly (91%) water vapour, but with some nitrogen, carbon dioxide and other simple carbon-based molecules (organics)

large crevasse features at south pole dubbed tiger stripes

intriguing hotspot at south pole - anomalous warmth in the area of the tiger stripes

presence of "orderly" water-ice at south pole, especially within tiger stripe features, indicates region must have been very hot, be very young, or both

presence of simple organics along the fractures

indication that water vapour and fine material are being ejected from tiger stripes

fine ice material is probably the significant and sustaining source of ice particles that make up Saturn's outermost ring - its E ring"

Regards,
Mark