The document discusses several topics related to our solar system including:
1) One of the Kuiper belt planets is Pluto, and astronomers discovered another called Eris. Pluto has a small atmosphere and is very cold, and it has a moon called Charon that is about half the size of Pluto.
2) The terrestrial planets like Earth are rocky, have many rocks that are very hard to break, and have bumpy surfaces. They are the five planets closest to the sun, and Mercury does not have a satellite.
3) The gas giants like Jupiter are larger than the terrestrial planets and are made of gas. Jupiter has a giant storm that has lasted for years. Jupiter is the