Relive Sunday's Epic Spacewalk

Expedition 61 Flight Engineers Christina Koch and Andrew Morgan of NASA completed a seven-hour and one minute spacewalk on Sunday. The two astronauts began the replacement of nickel-hydrogen batteries with newer, more powerful lithium-ion batteries on the far end of the station’s port truss.

The crew was so efficient that they were also able to accomplish get-ahead tasks, including the removal of an additional nickel-hydrogen battery, originally scheduled for an upcoming spacewalk.

These new batteries provide an improved power capacity for operations with a lighter mass and a smaller volume than the nickel-hydrogen batteries. On Oct. 11, Morgan and Koch are scheduled to venture outside again for another spacewalk to continue the battery replacements on the first of the two power channels for the station’s far port truss. The next spacewalks dedicated to the battery upgrades are scheduled on Oct. 11, 16, 21 and 25.