Blast off on a counting adventure in outer space! You'll see a planet with more than sixteen moons, count stars up to a trillion, and discover how our sun was made. This counting book is for those who dare to count where no one has gone before. Blast Off! combines informative text with numbers ranging from 0 to 20 to one trillion! As they count, young readers experience the life of an astronaut and visit each planet in our solar system. The remarkably detailed and realistic illustrations transport us into space for an amazing voyage.