Is the sun a star, or a planet? What was the first planet ever discovered? What is the name of the first satellite sent into space? Discover the wonders of our solar system and the amazing explorations of space. Learn about planets, constellations, stars, rockets and much more! With a whole galaxy to explore, this book is ideal for space voyagers of all ages. Hand up the giant-sized poster to see the solar system and get stickering!