Nonfiction writer extraordinaire, Elaine Scott, gives readers the up-to-the-minute scoop on why Pluto has been, well, demoted. She begins with the mnemonic "My very eager mother just served us nine pizzas" and then goes on to talk about the change we need to make now that Pluto has been classified as a dwarf planet. Scott returns to the very beginning of all this talk about astronomy and discusses how scientists have some to understand the solar system and its components. In simple but never simplistic text she explains the process of exploring those planets and their compositions. Great photographs from NASA satellites and other sources help illustrate and elaborate on the text as well.