@...@Scientists believe the tholin particles form high in the atmosphere, where ultraviolet sunlight breaks apart and ionizes nitrogen and methane molecules and allows them to react with one another to form more and more complex negatively and positively charged ions// When they recombine, they form very complex macromolecules, a process first found to occur in the upper atmosphere of Saturn*s moon Titan// ©The more complex molecules continue to combine and grow until they become small particles; volatile gases condense and coat their surfaces with ice frost before they have time to fall through the atmosphere to the surface, where they add to Pluto*s red coloring//
@...@In a second significant finding, New Horizons has detected numerous small, exposed regions of water ice on Pluto//© The discovery was made from data collected by the Ralph spectral composition mapper on New Horizons//