Variations on a logo for a publishing co.

“Enceladus is Saturn's sixth largest moon, only 157 miles (252 km) in mean radius, but it's one of the most scientifically compelling bodies in our solar system. Hydrothermal vents spew water vapor and ice particles from an underground ocean beneath the icy crust of Enceladus. This plume of material includes organic compounds, volatile gases, carbon dioxide, carbon monoxide, salts and silica.” says NASA.