In this book, students will learn about the planets and what makes each one unique. They will learn how variables and expressions are used to form mathematical equations-and have the opportunity to create their own equations as they journey through space. Used in the classroom or at home, this Spanish text includes a glossary, an index, dynamic images, and easy-to-read text to help students build their math, reading, and STEM skills while they are engaged in reading high-interest content.