Born almost 5 billion years ago at the edge of the Milky Way galaxy, our Solar System is a place filled with mystery and wonder. In the last fifty years, we have learned more than ever about the farthest reaches of our world. With dramatic full-color photographs and spacecraft images, OUR SOLAR SYSTEM takes young readers on a fascinating tour of the sun, the eight planets, and their moons, plus asteroids and comets. Award-winning science writer Seymour Simon presents this new, updated edition of his much admired book about the vast and mystifying part of the universe that we live in.