What is that robotic machine driving on the moon? It's a space rover! With the help of vibrant images and factual, elementary-level STEM text, this nonfiction astronomy title for children examines the history of space rovers and how the vehicles are used to explore and collect samples from the surfaces of moons, planets, and other celestial bodies. A space science feature spotlights a NASA rover nicknamed Percy and the research it conducted on Mars. Captions, on-page definitions, additional resources, and an index support readers in grade 2 and up.