NASA astronauts Butch Wilmore and Suni Williams originally planned to go to space for just eight days in June last year. But they got stuck on the ISS when their Boeing Starliner spacecraft experienced problems.

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.