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Expedition 61 Commander Luca Parmitano of ESA (European Space Agency) and NASA Flight Engineer Andrew Morgan concluded their spacewalk at 1:35 p.m. EST. During the six-hour and 33-minute spacewalk, the two astronauts successfully cut a total of eight stainless steel tubes, including one that vented the remaining carbon dioxide from the old cooling pump. The crew members also prepared a power cable and installed a mechanical attachment device in advance of installing the new cooling system.

Today’s work clears the way for Parmitano and Morgan’s next spacewalk in the repair series Monday Dec. 2. The plan is to bypass the old thermal control system by attaching a new one off the side of AMS during the third spacewalk, and then conduct leak checks on a fourth spacewalk.

For more on the AMS science and spacewalks, listen to the recent podcasts:

• Houston We Have a Podcast Ep 117: Alpha Magnetic Spectrometer: The Science
• Houston We Have a Podcast Ep 118: Alpha Magnetic Spectrometer: The Spacewalks
• Houston We Have a Podcast Ep 119: Alpha Magnetic Spectrometer: The Tools

Space station crew members have conducted 223 spacewalks in support of assembly and maintenance of the orbiting laboratory. Spacewalkers have now spent a total of 58 days 9 hours and 41 minutes working outside the station. Parmitano has now conducted three spacewalks in his career and Morgan has now logged four spacewalks since his arrival on the station in July.

Keep up with the crew aboard the International Space Station on the agency’s blog, follow @ISS on Instagram, and @space_station on Twitter.

Two astronauts switched their spacesuits to battery power this morning at 7:02 a.m. EST aboard the International Space Station to begin a spacewalk planned to last about six-and-a-half hours. Expedition 61 Commander Luca Parmitano of ESA (European Space Agency) and NASA Flight Engineer Andrew Morgan will venture outside the International Space Station for the second in a series of complex spacewalks to replace a cooling system on the Alpha Magnetic Spectrometer (AMS), a cosmic ray detector.

Parmitano is designated extravehicular crewmember 1 (EV 1), wearing the suit with red stripes, and with the helmet camera labeled #11. Morgan is designated extravehicular crew member 2 (EV 2), wearing the suit with no stripes, and with helmet camera #18.

In addition to revitalizing an important piece of scientific equipment, the process of creating the tools and procedures for these spacewalks is preparing teams for the types of spacewalks that may be required on Moon and Mars missions. The tools include plumbing instruments to cut into the cooling lines, new screwdriver bits and devices to capture the fasteners the astronauts remove from AMS. Learn more about the unique tools developed for the spacewalks to repair AMS.

Watch the spacewalk on NASA TV and on the agency’s website.

Follow @space_station on Twitter for updates online. Learn more about the International Space Station online, including additional information about the current crew members.

The Expedition 61 astronauts are in final preparations before Friday’s spacewalk to continue repairing the International Space Station’s cosmic particle detector. The orbital residents also had time today to set up research hardware for upcoming space biology activities.

Spacewalkers Andrew Morgan and Luca Parmitano will exit the Quest airlock on Friday after setting their U.S. spacesuits to battery power at 6:50 a.m. EST. The duo will translate to the far side of the station’s starboard truss structure to continue the intricate work to upgrade the Alpha Magnetic Spectrometer’s (AMS) thermal control system. NASA TV begins its live coverage beginning at 5:30 a.m.

Flight Engineers Jessica Meir and Christina Koch will assist the spacewalkers during the excursion from inside the station on Friday. Meir will be on robotics duty maneuvering the Canadarm2 robotic arm while Koch manages their spacesuits.

Even with spacewalk activities dominating the schedule aboard the orbiting lab, the station crew still had time to conduct advanced space research. Meir set up a 3-D bioprinter for a test run today before the device begins manufacturing complex organ-like tissues in space. Koch is readying a variety of life science gear for next week’s operations to study how microgravity affects systems at the cellular level for insights into Earth-bound ailments.

The cosmonauts in the Russian segment of the space station focused primarily on lab maintenance. Flight Engineers Alexander Skvortsov and Oleg Skripochka replaced batteries and dust filters. The duo then packed the Progress 72 (72P) resupply ship with trash and repressurized the station with oxygen from the 72P.