Seeing Pluto in this light makes me curious what's on the surface. Although knowing that Pluto is tidally locked with it's moon, Charon, I've always been curious what a time-lapse shot from the surface Pluto, looking at Charon, would look like. Although I know I'll never live to see it (not in the depressing sense, it just isn't anywhere CLOSE to feasible for a manned mission to the misunderstood planet with our current tech), I hope my great-great-great grandkids get to enjoy something like that.
I imagine it looks a bit like how the Earth looks from the surface of the moon - undulating around a fixed point in the sky. In fact you can see for yourself if you install Celestia. Go to a point on Pluto from which Charon is visible, track Pluto's orbit (Y), enable Options->Show Grids->Grid: Horizontal, accelerate time (L) and you should see Charon bobbing up and down about 20° along the ecliptic.
I found this article describing what they think the chemical composition is: http://www.universetoday.com/121158/red-faced-pluto-full-of-surprises/ To quote: "Pluto’s coloration is likely caused by hydrocarbon molecules called tholins that are formed when cosmic rays and solar ultraviolet light interact with methane in Pluto’s atmosphere."