What are stars made of? How hot is the Sun? Which planet's moons look like potatoes? Learn the answers to these questions and more in this fascinating question-and-answer book all about space. Information is presented in bite-sized nuggets, making it ideal for dipping in and out.

Colorful illustrations by award-winning artist Marie-Ève Tremblay bring space to life, from amazing alien planets to incredible rockets. This is the ideal book for kids who are curious about the mysteries of the universe.

Other titles in the I Wonder Why series include The Sea Is Salty, The Sun Rises and Camels Have Humps.