NASA’s two stuck astronauts took their first spacewalk together Thursday, exiting the International Space Station almost eight months after moving in. Commander Suni Williams and Butch Wilmore removed a broken antenna and wiped the station’s exterior for evidence of any microbes that might still be alive after launching from Earth and escaping through vents.

Commander Suni Williams and Flight Engineer Butch Wilmore are scheduled to begin a six-and-a-half-hour spacewalk at 8 am EST on Thursday.

Sunita Williams along with her fellow astronaut Butch Willmore have been at the ISS since June last year. The pair had launched aboard Boeing's Starliner spacecraft on June 5 for its first crewed flight,