? quoi sert l'atmosph?re de la Terre? Pourquoi y a-t-il quatre saisons sur Terre? Que font les rovers sur Mars?

What are stars made of? What surrounds them in our Solar System? Learn all about the planets and stars with this dazzling series. Through straightforward sentence structure and enlightening images, readers with a wide range of reading ability can enjoy these titles.

What does Earth's atmosphere do? What makes Earth's seasons? Are rovers exploring Mars?

Original Title: Up in Space: Earth and Mars