Explains what dwarf planets are and where they are located in the solar system, and describes the characteristics of the three known dwarf planets, including Ceres, Pluto, and Eris.
Provides information about stars, explaining what they are and how they are structured, looking at different types of stars, describing how stars are formed, live, and die, and reviewing the history of space discovery.
Provides information about Earth's moon, describes its atmosphere, surface, and interior, looks at the phases of the moon, and discusses the history of moon exploration and discovery.
