1Explore our solar system and beyond in a uniquely fun and informative study of the heavens Students of several different ages and skill levels can use Exploring the World of Astronomy. Middle school students can read the book independently and quickly test their understanding and comprehension by the challenge of answering questions at the end of each chapter. High school students can revisit the book as a refresher course. They will gain greater insight by using the section below the questions marked "Explore More." You will find additional questions, discussion ideas, and research for students to develop a greater understanding of astronomy.