CAPE CANAVERAL, Fla. — Spacewalking astronauts wrapped up months of repair work Friday on the International Space Station ‘s big robot arm.
The Canadian-built, 58-foot robot arm had both of its aging mechanical hands replaced on spacewalks conducted in October and January. NASA astronaut Mark Vande Hei and Japan’s Norishige Kanai quickly moved one of those old hands to a long-term storage location outside, and prepped the other to bring it back inside so it can be returned to Earth for a tuneup and then flown back up.
This last spacewalk in the series should have been completed by now, but was postponed because of complications with the robotic hand that was installed last month. Ground controllers eventually solved the problem. Further delays were caused by this week’s late arrival of a Russian supply ship.
The old mechanical hands are original space station parts, in orbit since 2001. Each hand — a bulky bundle of latches — is more than 3 feet, or a meter, long and more than 440 pounds (200 kilograms).