Fountains of Enceladus
Recent Cassini images of Saturn's moon Enceladus backlit by the sun show the fountain-like sources of the fine spray of material that towers over the south polar region. The image was taken looking more or less broadside at the "tiger stripe" fractures observed in earlier Enceladus images. It shows discrete plumes of a variety of apparent sizes above the limb of the moon.
The greatly enhanced and colorized image shows the enormous extent of the fainter, larger-scale component of the plume.
Imaging scientistsbelieve that the jets are geysers erupting from pressurized subsurface reservoirs of liquid water above 273 degrees Kelvin (0 degrees Celsius).
Image Credit: NASA/JPL/Space Science Institute