Pluto isn't blue

Actually, it's red! Pluto has long been popularly depicted as grayish or blue, though scientists have suspected for decades that the distant dwarf planet has a reddish hue. But because Pluto is millions of miles away, we really didn't know for sure. Now, thanks to photos taken by the unmanned spacecraft New Horizons, we know that Pluto is red. New Horizons, which has been in transit for nearly a decade, has come closer to Pluto than any manmade material ever has before. In a week, New Horizons w...