The Nine Planets of the Solar System | Guide to Astronomy Grade 4 | Children's Astronomy & Space Books
There are nine known planets in our solar system. They are the inner planets, otherwise called as the terrestrial planets, and the outer or Jovian planets. Recently, scientists have re-categorized Pluto as a dwarf planet. In this book, you will read about the characteristics of these nine planets and how they revolve around the Sun. Buy a copy and start reading today.