Rocks in Space?

There are four places that may have water or ice in space. There's only certain types of rocks that can be frozen and then bent again. Space has a planet called Pluto, which has frozen nitrogen. This looks like rocks, but it is actually a frozen element.

There is a lot of nitrogen in space, and spaceships are made of aluminum (also an element!) because that is one of the only things that can survive nitrogen and keep the astronauts alive. An aluminum spaceship can withstand lots of months being in space. The elements work together like peanut butter and jelly!