HOUSTON -- Like handymen caulking a bathtub, two spacewalking astronauts squirted pink putty into deliberately damaged tile samples to test a new technique for repairing the space shuttle's fragile ...

HOUSTON — Spacewalking astronauts started a coolant tank exchange, retrieved a science experiment and replaced a rate gyro assembly outside the International Space Station early April 9. Rick ...

A spacewalking astronaut ran into trouble Sunday while trying to lubricate a joint in the life-sustaining solar power system of the International Space Station, losing one bolt and getting a washer ...

HOUSTON — Spacewalking astronauts from the shuttle Discovery finished plumbing a newly installed coolant tank outside the International Space Station (ISS) April 13, but a stuck nitrogen valve ...