Now, the scientists are reaping the rewards from that came to within 7,600 miles from Pluto's surface with this latest, mind-blowing image of icy mountains on Pluto:
The surface of Pluto is covered in nitrogen ice, but "you can't make mountains out of that stuff," Stern said. "We are seeing the bedrock, or the bed ice. These mountains are made from frozen water." .... http://www.businessinsider.com