Discovering the little moon also reinforces the theory that most dwarf planets have moons.
Enceladus: Enceladus has shown geysers of water that were confirmed by the Cassini spacecraft in 2005. Gravimetric data obtained from 2010 to 2011 confirmed the existence of a subsurface ocean. Even though originally it was thought to be localized, most likely in a region of the icy moon's southern hemisphere, evidence collected in 2015 indicates the subsurface ocean is actually global. Furthermore, in additon to water, these geysers from vents located near the south pole of Enceladus contain tiny quantities of salt, nitrogen, carbon dioxide, and volatile hydrocarbons. Tidal flux from Saturn is apparently responsible for the melting of the ocean water, as well as the geysers.
Almost every starving child in the world could be fed and clothed for a decade for the cost of sending up only one moon shot. My bible, my conscience, my common sense and every bone in my body says that would be a far better way to spend the fifteen billion bucks.