Archivo del Autor: admin

Expedition 61 crew members Andrew Morgan of NASA and Luca Parmitano of ESA (European Space Agency) concluded their spacewalk at 1:20 p.m. EST. During the 6 hour, 16 minute spacewalk, the two astronauts successfully completed leak checks for the cooling system on the Alpha Magnetic Spectrometer (AMS) and opened a valve to being pressurizing the system. Preliminary testing shows AMS is responding as expected.

Ground teams will work over the next several days to fill the new AMS thermal control system with carbon dioxide, allow the system to stabilize, and power on the pumps to verify and optimize their performance. The tracker, one of several detectors on AMS, should be collecting science data again before the end of next week. The upgraded cooling system is expected to support AMS through the lifetime of the space station.

AMS is a joint effort between NASA and the Department of Energy’s Office of Science and is led by Principal Investigator Samuel Ting, a Nobel laureate from the Massachusetts Institute of Technology. The AMS team includes some 600 physicists from 56 institutions in 16 countries from Europe, North America and Asia. AMS has been capturing high-energy cosmic rays to help researchers answer fundamental questions about the nature of antimatter, the unseen “dark matter” that makes up most of the mass in the universe, and the even-more-mysterious dark energy that is speeding up the expansion of the cosmos.

The astronauts also completed an additional task to remove degraded lens filters on two  high-definition video cameras.

This was the fourth spacewalk by Morgan and Parmitano to repair the spectrometer and the 227^th in support of station assembly, maintenance and upgrades. For Morgan, it was the seventh spacewalk of his career, for a total of 45 hours and 48 minutes, and the sixth for Parmitano, with a total of 33 hours and 9 minutes, who will return to Earth Feb. 6 in a Russian Soyuz spacecraft to complete a six-and-a-half month mission on the outpost. Spacewalkers have now spent a total of 59 days 12 hours and 26 minutes working outside the station. This was also the ninth spacewalk for the Expedition 61 crew, more than in any other increment in the history of the station.

Learn more about space station activities by following @space_station and @ISS_Research on Twitter as well as the ISS Facebook and ISS Instagram accounts.

Two astronauts switched their spacesuits to battery power this morning at 7:04 a.m., EST aboard the International Space Station to begin a spacewalk planned to last about six-and-a-half hours. NASA Flight Engineer Andrew Morgan and Expedition 61 Commander Luca Parmitano of ESA (European Space Agency) will venture outside the International Space Station to complete repairs on a cooling system for the Alpha Magnetic Spectrometer (AMS), a cosmic ray detector. The duo will conduct leak checks for the spectrometer’s refurbished cooling lines and complete the work to resume operations of the cosmic ray detector.

Morgan is designated extravehicular crewmember 1 (EV 1), wearing the suit with red stripes, and with the helmet camera labeled #20. Parmitano is designated extravehicular crew member 2 (EV 2), wearing the suit with no stripes, and with helmet camera #18.

During the first three spacewalks in the complex series to repair the AMS, the astronauts carefully prepared the AMS and positioned materials, installed the upgraded cooling system, completed the power and data cable connection for the system. The intricate connection work required making a clean cut for eight existing stainless steel tube cooling lines connected to the AMS then connecting it to the new system through a process of metalworking known as swaging. Following the third spacewalk, the flight control team on Earth initiated power-up and confirmed the new system was receiving power and data.

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.

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.

Expedition 61 NASA Flight Engineer Andrew Morgan and Commander Luca Parmitano of ESA (European Space Agency) will begin a spacewalk outside of the International Space Station at about 6:50 a.m. EST Saturday, Jan. 25. NASA Television coverage of the spacewalk will begin at 5:30 a.m.

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

This will be the ninth spacewalk for the Expedition 61 crew, more than in any other increment in the history of the station. The two astronauts will venture outside the International Space Station for the last planned spacewalk in a series to repair the Alpha Magnetic Spectrometer (AMS), a cosmic ray detector.

These spacewalks are considered the most complex of their kind since the Hubble Space Telescope servicing missions. The AMS originally was designed for a three-year mission and, unlike Hubble, was not designed to be serviced once in space. More than 20 unique tools were designed for the intricate repair work, which included cutting and splicing of eight cooling tubes to connect to a new cooling system, and connecting a myriad of power and data cables.

Watch the animation for today’s spacewalk:

Recap briefings from the beginning of the AMS repair series for more detail:

• AMS Overview briefing
• Spacewalk preview briefing

For more information about 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

Follow @space_station on Twitter for updates online. For more information about the International Space Station, visit www.nasa.gov/station.