Explore space--and rocket past the boundaries of our known universe! Did you know that some planets have more than 1 sun or moon? Or that our nearest space neighbor, Proxima Centauri, is about 25 trillion miles away? Discover different types of planets and solar systems, as well as the power of gravity--all while looking to the stars! Ignite your scientific mind with fun facts, activities, and experiments. Try this: Track the...