Readers go on a fast-paced tour of outer space, heading out from Earth into the solar system and, over increasingly enormous distances, the galaxy. They pass the moon, the sun (so big over a millions Earths could fit in it!), all the planets in turn, the Kuiper Belt (out beyond the planets, billions of objects orbiting the sun!), and the Oort cloud, before reaching interstellar space, where distances are measured not in miles, but by light-years. As they travel, they pick up essential information along the way. Numbers big and small about speeds, distances, and sizes help make sense of what the reader sees, and fascinating facts enrich this enthralling journey through the wonders of the universe.