What is a Dwarf Planet? What is Neptune made of? Who discovered the Outer Planets? Find the answers in The Outer Planets. Learn about the distant gas planets of Uranus and Neptune, as well as Dwarf Planets Pluto and Eris. Learn how our knowledge about these planets has grown in recent years. This book takes you to the farthest reaches of our Solar System to bring back the information you need. Book jacket.
