NASA expects robots like R2 to be a huge help to astronauts．“Our goal is for robots to work side by side with humans,” says NASA’s Matt Ondler．R2 is controlled by humans using laptops． It’s programmed to perform a number of small tasks, such as “find an object．” In most situations, humans are still far better with their hands than robots．But that’s not necessarily true in space, where astronauts must wear bulky spacesuits and heavy gloves．And since they don’t need to eat, breathe, or go to the bathroom, robonauts have the advantage for lengthy jobs．

　　R2 isn’t ready for spacewalks yet, but NASA hopes that future improvements will make this possible．“Robonauts will help our astronauts with the three D’s: jobs that are dirty, dull, and dangerous,” says Ondler．

　　To The Moon

　　Someday the space agency hopes to send R2 to the moon．Sending a robot to the moon will befar less expensive than sending a human．A robot is stronger, can survive in tighter spaces, and doesn’t need air．Even better, robots don’t care how long it takes for NASA to return them to Earth．

　　Once on the moon, the robonaut could perform experiments, send live video back to Earth, talk to classrooms full of kids, and explore the lunar surface．R2 will be able to move using legs, or by attaching its torso（躯干）to a four-wheeled rover（探测器） and becoming part of vehicle．And when R2’s battery is low, it can plug into a solar-powered recharging station and get some much-needed juice．All in all, a pretty sweet life for a humble robot!

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