New Horizons Takes First Color Image of Pluto and Charon
Ralph is an optical instrument that can record in both visible and infrared light. Its primary use will be in mapping surfaces and providing thermal images. Ralph is one of seven scientific instruments aboard New Horizons. Together, these instruments will allow scientists to investigate the surface geology, composition, atmospheric pressure, and temperature of Pluto and its moons.
Over the coming weeks, as New Horizons gets closer to the Pluto system, we will “eventually see surface features as small as a few miles across”, according to NASA.