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.
One of the station's solar arrays is leaking coolant used to prevent the station's power systems from overheating, but it apparently doesn't pose a danger to the crew.
In one of the coolest zero-g cover songs ever recorded, Canadian astronaut Chris Hadfield does a heartfelt rendition of David Bowie's classic before returning to Earth.
An all-veteran crew is making final preparations for launch this weekend to the International Space Station, kicking off a busy six weeks highlighted by multiple dockings, undockings, and a pair of spacewalks.
Standing 2,080 feet tall, the Tokyo Sky Tree is a new digital broadcast tower built on reclaimed land in the Japanese capital. Engineers are confident it won't topple in an earthquake.
Boston Dynamics' supersized AlphaDog gets let off the leash in a forest. This is one monster robot--check out the DARPA video for yourself.
New research claims 37 per cent of adults admit to being 'highly addicted' to their smart phones and 22 per cent admit to using them on the loo. We're hardly surprised.
Leaving the International Space Station behind for the last time, the shuttle Atlantis' crew undocks and gears up for re-entry and landing Thursday to close out NASA's 135th and final shuttle flight.
When NASA retires the space shuttle fleet next month with STS-135, the mission will carry a refueling experiment that could help extend the life of satellites.
A $2 billion cosmic ray detector attached to the International Space Station today already is beaming down a steady stream of data as torrents of high-energy particles from deep space pass through.