Astronauts Mastravvhio and Hopkins Complete First in Series of Spacewalks

On Sunday, Dec. 22, NASA astronaut Mike Hopkins tweeted this photo of Saturday's spacewalk, saying, "Wow... can't believe that is me yesterday. Wish I could find the words to describe the experience, truly amazing."

Expedition 38 Flight Engineers Rick Mastracchio and Mike Hopkins wrapped up a 5-hour, 28-minute spacewalk outside the International Space Station at 12:29 p.m. EST Saturday. 

They completed the first in a series of excursions aimed at replacing a degraded ammonia pump module associated with one of the station's two external cooling loops that keeps both internal and external equipment cool.

A second spacewalk to install a replacement pump module is scheduled for Tuesday, Dec. 24 at 7:10 a.m. EST, with NASA TV coverage beginning at 6:15 a.m. EST.

Credit: NASA