Today, however, very little solid water exists on these planets. (americaspace.com)
Once thought to be a relatively inactive world, being so bitterly cold and far from the Sun, Pluto has been shown to be more geologically active than anticipated, with mountains of solid water ice, canyons, unusual pits, and large, slowly moving glaciers of nitrogen, methane, and carbon monoxide ices. (americaspace.com)
Topher, contiuning your example of the states of water, when heat is applied, solid water becomes liquid water which become gaseous water. (religion.blogs.cnn.com)