NASA wouldn't know nearly as much about the planet Mars without space probes. A special kind of robot that can fly through space, space probes have gone to the asteroid belt and even traveled near Jupiter to take pictures of it! Readers learn all about these incredible robots as well as other space technology including robotnauts, or robot astronauts! Examples of the robots used in space are shown in full-color photographs, complete with explanations of their abilities. The main content and sidebars delve into the technological and scientific side of creating robots and how important they've become to space exploration.