Below a darkened Enceladus, a plume of water ice is backlit in this view of one of Saturn's most dramatic moons. The image was taken on Feb. 20, 2012.

 Below a darkened Enceladus, a plume of water ice is backlit in this view of one of Saturn's most dramatic moons. The image was taken on Feb. 20, 2012.

Enceladus 'E-18' Flyby -- Destination: Plumes

The Fields, Particles and Waves instruments were prime (particularly the ion and neutral mass spectrometer [INMS]) to study the composition, density, three-dimensional structure and variability of plumes; with E-14, and E-17, this flyby provided good coverage of south polar regions.