The Olympic torch arrived on the International Space Station, but how will it do during a spacewalk?
But now they're home for the holidays -- home at the International Space Station, that is, after a high-stakes repair job clearing the way for reactivation of a critical coolant system.
An impromptu spacewalk triggered by the sight of ammonia flakes drifting past a window of the International Space Station wraps up with a replaced pump and a plan for "additional detective work."
Want to know what work will be like for the astronauts who'll be repairing the Hubble Space Telescope? NASA and DigitalSpace have a tool for you.
Faced with an unexpected ammonia leak, NASA engineers revise plans for replacing a coolant system pump aboard the International Space Station.
A problem with the carbon dioxide removal system in astronaut Chris Cassidy's spacesuit forces flight controllers to terminate a space station battery replacement spacewalk.
Two Endeavour astronauts stage a second spacewalk to store critical spare parts on the International Space Station while crewmates inside repair a flooded toilet.
Astronauts carry out invasive surgery on Hubble telescope, working around problems to install new gyroscopes and fresh batteries during a marathon spacewalk.
Red Hat's Project Spacewalk is notable for its promise, but also for its lack of evangelism to live up to that promise.
Two cosmonauts pass the Olympic torch during a spacewalk outside the International Space Station as it orbits some 260 miles above Earth.