At the time of writing, Williams and ISS crewmate, Nick Hague, are conducting NASA’s first spacewalk in over a year. The pair are scheduled to spend roughly 6.5 hours in the vacuum of space, where they will work on a number of long overdue external repairs and equipment assessments.

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.

NASA astronaut Sunni Williams, one-half Boeing Starliner crew who have been stuck on the International Space Station for months, took part in a spacewalk on Thursday to do some repairs to the orbiting laboratory.

NASA astronauts Sunita Williams and Nick Hague embark on a crucial spacewalk outside the ISS, marking Williams' eighth spacewalk and Hague's fourth, to perform essential repairs and maintenance.

Nasa astronaut Suni Williams, one of two astronauts stuck on the International Space Station, has completed her first spacewalk since arriving.

Suni Williams, one of two astronauts who has been stuck on the International Space Station after a technical issue delayed a planned return to Earth, was performing outdoor repair work on Thursday along with astronaut Nick Hague.

NASA astronauts at the ISS go on a spacewalk to work on some upgrades at the site::Nick Hague and Suni Williams took in views of Earth as they undertook their work. The spacewalk is expected to go for about six hours.

This is the first on-orbit repair of a NASA space telescope by astronauts since the final Hubble servicing mission in 2009.