Faulty satellite? Robot geek squad is on the horizon

This artist's rendering shows the robotic arms that are being built for DARPA's RSGS program. The robotic servicer, on the left, is preparing to use a tool to open a stuck solar array on a disabled satellite. (SSL)

Hundreds of millions of dollars can go into the school bus-sized satellites that blast into orbit above Earth and provide services including broadband internet, broadcasting and military surveillance. 

But if a part breaks or a satellite runs out of fuel, there's no way to send help.