Some people might think of planets as all being pretty similar, but they actually come in vastly different sizes and are made up of many different elements. Readers of this fascinating book will learn about the different planets in our solar system. They'll learn that some, like Earth, are rocky, while others, such as Jupiter, are made up of gas. Informative fact boxes present numerical information in a manageable and easy-to-understand way. Colorful images and diagrams correlate closely with clear and concise text that will engage readers of all ages.