NASA astronauts Sunita "Suni" Williams and Barry "Butch" Wilmore surely didn't think they'd still be on the International ...

Two spacewalks scheduled for this January will see astronauts updating station hardware and searching for microorganisms on ...

The two astronauts have a busy day ahead of them. Hague and Williams will "patch light leaks in the NICER X-ray telescope, ...

To comply, NASA has sought to sanitize Mars rovers at a threshold of no more than 300,000 bacterial spores on any surface.

LIVE: Astronauts Sunita Williams and Nick Hague are to conduct a 6.5-hour spacewalk outside the ISS to perform critical maintenance and upgrades.

Two NASA astronauts are set to venture outside the International Space Station (ISS) in search of signs of life. Butch Wilmore and Suni Williams should have been back on Earth months ago, but, thanks ...

Surface samples will be collected near life support system vents, as detailed in a NASA statement published on Tuesday, and could shed light on how, or even if, the ISS releases microorganisms ...

One of NASA's two stuck astronauts has stepped out on her first spacewalk since arriving at the International Space Station ...

For nearly seven months, the corridors of the International Space Station (ISS) have been devoid of the usual bustle of ...

NASA will webcast the spacewalk live, beginning at 6:30 a.m. EST (1130 ... is a $2 billion particle detector that launched to the ISS in 2011. The instrument hunts for elusive dark matter by ...

One of NASA's two stuck astronauts is getting a change of scenery. Suni Williams stepped out on a spacewalk Thursday, her ...