Autonomous Space Assembly Robot SpaceBuild Completes First Extravehicular Structural Assembly Mission on the ISS

Autonomous Space Assembly Robot SpaceBuild Completes First Extravehicular Structural Assembly Mission on the ISS

On July 9, 2030, the SpaceBuild autonomous space assembly robot, a collaboration between NASA and Northrop Grumman, completed the first fully autonomous extravehicular structural assembly mission on the International Space Station. During a 6-hour operation, SpaceBuild independently grasped, positioned, and bolted three prefabricated carbon-fiber truss components, installing them onto the station's truss structure.

Previous space assembly missions have been heavily reliant on extravehicular activities (EVAs) by astronauts, with each EVA costing approximately $100 million and exposing astronauts to radiation and micrometeorite impact risks. SpaceBuild's emergence means that future large-scale space structures — such as deep-space telescopes, space factories, and lunar bases — can be assembled autonomously by robots.

SpaceBuild features two 7-degree-of-freedom robotic arms with force-torque sensors and vision-guided systems at the endpoints, enabling millimeter-precision assembly in microgravity. The robot's control algorithms have been specifically optimized for microgravity dynamics, capable of handling reaction forces generated during assembly.

"SpaceBuild has proven that robots can perform fine operations in space comparable to human astronauts," said Julie Shah, head of NASA's robotics program. "This isn't about replacing astronauts — it's about freeing them to do more valuable work."

NASA plans to use SpaceBuild to participate in constructing the primary mirror structure of the LUVOIR space telescope by 2032. Northrop Grumman is also developing a commercial version of SpaceBuild for commercial space stations.