Crew from the International Space Station will execute a spacewalk Thursday, NASA announced.

The space agency will preview the spacewalk later today.

The five-and-a-half hour spacewalk begins at 6:40 p.m. ET Thursday, with live coverage starting at 5:30 p.m. ET on NASA TV. It’s the first of two spacewalks for Expedition 13 Commander Pavel Vinogradov and Flight Engineer Jeff Williams during their six-month mission.

Clad in Russian Orlan space suits, Vinogradov and Williams will exit the station from the Pirs airlock.