NASA astronauts Sunita "Suni" Williams and Barry "Butch" Wilmore surely didn't think they'd still be on the International Space Station this long when they left Earth in June. In fact, they initially expected to stay for just eight days.

NASA astronauts Sunita Williams and Nick Hague are set to step outside the International Space Station (ISS) for a spacewalk.

Two NASA astronauts are currently hard at work in space, patching up an instrument called NICER (Neutron star Interior Composition Explorer).

Suni Williams stepped out on a spacewalk Thursday, her first since arriving at the International Space Station seven months ago.

The two astronauts have a busy day ahead of them. Hague and Williams will "patch light leaks in the NICER X-ray telescope, then ready the Alpha Magnetic Spectrometer for future upgrades," NASA officials wrote in a Jan. 15 blog post.

The pictures were taken inside the International Space Station last week, when Sunita Williams and Nick Hague donned spacesuits to carry out “fit checks.”

During this spacewalk, Williams and Hague will step out to replace a rate gyro assembly which provides orientation control for the space station. They will install patches to cover the damaged areas of light filters for Neutron Star Interior Composition Explorer (NICER),

After a gap of more than a year, NASA successfully resumed spacewalks outside the International Space Station on Thursday. NASA astronauts Nick Hague and Suni Williams, dressed in pressurized NASA spacesuits, moved through the Quest airlock and into the vacuum of space.

Astronauts Suni Williams and Nick Hague completed pivotal maintenance tasks on the International Space Station in their latest spacewalk, enhancing its research capabilities. NASA astronauts Suni Williams and Nick Hague successfully completed a 6-hour spacewalk on January 16,

Suni Williams, one of NASA's two stuck astronauts, stepped out on her first spacewalk since arriving at the International Space Station seven months ago.

Suni Williams, the station's commander, had to tackle some overdue outdoor repair work alongside NASA's Nick Hague. Plans called for Williams to float back out next week with Butch Wilmore.

Nasa plans to bring both astronauts back to Earth in late March aboard a spaceship built by SpaceX. They have continued their work aboard the ISS while awaiting a return home.