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Russians Outfit the ISS
Russian cosmonauts Gennady Padalka (top), Expedition 32 commander; and Yuri Malenchenko, flight engineer, participate in a session of extravehicular activity (EVA) to continue outfitting the International Space Station. During the five-hour, 51-minute spacewalk on August 20, 2012, Padalka and Malenchenko moved the Strela-2 cargo boom from the Pirs docking compartment to the Zarya module to prepare Pirs for its eventual replacement with a new Russian multipurpose laboratory module. The two spacewalking cosmonauts also installed micrometeoroid debris shields on the exterior of the Zvezda service module and deployed a small science satellite. 
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Expedition 30 Cosmonauts Perform Spacewalk
This image of Russian cosmonauts Oleg Kononenko and Anton Shkaplerov, both Expedition 30 flight engineers, was taken during a spacewalk on Thursday, Feb. 16, 2012. During the six-hour, 15-minute spacewalk, Kononenko and Shkaplerov moved the Strela-1 crane from the Pirs Docking Compartment in preparation for replacing it in 2012 with a new laboratory and docking module. The duo used another boom, the Strela-2, to move the hand-operated crane to the Poisk module for future assembly and maintenance work. Both telescoping booms extend like fishing rods and are used to move massive components outside the station. On the exterior of the Poisk Mini-Research Module 2, they also installed the Vinoslivost Materials Sample Experiment, which will investigate the influence of space on the mechanical properties of the materials. The spacewalkers also collected a test sample from underneath the insulation on the Zvezda Service Module to search for any signs of living organisms. Both spacewalkers wore Russian Orlan spacesuits bearing blue stripes and equipped with NASA helmet cameras.
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Sunita Williams on Spacewalk
NASA astronaut Sunita Williams, Expedition 32 flight engineer, appears to touch the bright sun during the mission’s third session of extravehicular activity (EVA) on Sept. 5, 2012. 
During the six-hour, 28-minute spacewalk, Williams and Japan Aerospace Exploration Agency astronaut Aki Hoshide (visible in the reflections of Williams’ helmet visor), flight engineer, completed the installation of a Main Bus Switching Unit (MBSU) that was hampered by a possible misalignment and damaged threads where a bolt must be placed. They also installed a camera on the International Space Station’s robotic arm, Canadarm2.
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ISS28-E-005403 (25 May 2011) --- At one of the International Space Station's trusses, NASA astronaut Michael Fincke is pictured during the STS-134 mission's third spacewalk. Astronauts Fincke and Andrew Feustel (out of frame), both mission specialists, coordinated their shared activity with NASA astronaut Greg Chamitoff (out of frame), who stayed in communication with the pair and with Mission Control Center in Houston from the shirt sleeve environment inside the station.
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Cosmonauts Conduct Spacewalk
Cosmonauts Sergei Volkov and Alexander Samokutyaev (out of frame), attired in Russian Orlan spacesuits, conducted a spacewalk on Wednesday, Aug. 3, 2011, on the Russian segment of the International Space Station. During the six-hour, 23-minute spacewalk, the Expedition 28 flight engineers moved a cargo boom from one airlock to another, installed a prototype laser communications system and deployed an amateur radio micro-satellite.
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Work Is a Spacewalk
During the STS-131 mission's first spacewalk, astronauts Rick Mastracchio and Clayton Anderson (out of frame) moved a new 1,700-pound ammonia tank from space shuttle Discovery's cargo bay to a temporary parking place on the station, retrieved an experiment from the Japanese Kibo Laboratory exposed facility and replaced a Rate Gyro Assembly on one of the truss segments.
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ISS018-E-039022 (10 March 2009) --- Astronaut Michael Fincke, Expedition 18 commander, participates in a session of extravehicular activity (EVA) to perform maintenance on the International Space Station. During the 4-hour, 49-minute spacewalk, Fincke and cosmonaut Yury Lonchakov (out of frame) reinstalled the Exposing Specimens of Organic and Biological Materials to Open Space (Expose-R) experiment on the universal science platform mounted to the exterior of the Zvezda Service Module. The spacewalkers also removed straps, or tape, from the area of the docking target on the Pirs airlock and docking compartment. The tape was removed to ensure it does not get in the way during the arrival of visiting Soyuz or Progress spacecraft. Photo credit: NASA
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ISS017-E-011302 (15 July 2008) --- Russian Federal Space Agency cosmonaut Sergei Volkov, Expedition 17 commander, participates in a session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the five-hour, 54-minute spacewalk, Volkov and cosmonaut Oleg Kononenko (out of frame), flight engineer, continued to outfit the station's exterior, including the installation of a docking target on the Zvezda Service Module. Photo credit: NASA
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ISS017-E-011310 (15 July 2008) --- This close-up view shows reflections in the visor of Russian Federal Space Agency cosmonaut Oleg Kononenko, Expedition 17 flight engineer, as he participates in a session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. Visible in the reflections in the visor are cosmonaut Sergei Volkov, commander, and various components of the station. During the five-hour, 54-minute spacewalk, Kononenko and Volkov continued to outfit the station's exterior, including the installation of a docking target on the Zvezda Service Module. Photo credit: NASA 
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ISS014-E-13326 (4 Feb. 2007) --- Astronaut Sunita L. Williams, Expedition 14 flight engineer, uses a digital still camera to expose a photo of her helmet visor during today's session of extravehicular activity (EVA) as construction continues on the International Space Station. Also visible in the reflections in the visor is a solar array wing. During the spacewalk, Williams and Michael E. Lopez-Alegria (out of frame), commander and NASA space station science officer, reconfigured the second of two cooling loops for the Destiny laboratory module, secured the aft radiator of the P6 truss after retraction and prepared the obsolete Early Ammonia Servicer (EAS) for removal this summer. 
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ISS014-E-09795 (14 Dec. 2006) --- European Space Agency (ESA) astronaut Christer Fuglesang, STS-116 mission specialist, participates in the mission's second of three planned sessions of extravehicular activity (EVA) as construction resumes on the International Space Station. Astronaut Robert L. Curbeam, Jr. (out of frame), mission specialist, also participated in the spacewalk. 
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S128-E-007035 (1 Sept. 2009) --- Astronaut Nicole Stott, Expedition 20 flight engineer, participates in the STS-128 mission's first session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 35-minute spacewalk, Stott and astronaut John "Danny" Olivas (out of frame), mission specialist, removed an empty ammonia tank from the station's truss and temporarily stowed it on the station's robotic arm. Olivas and Stott also retrieved the European Technology Exposure Facility (EuTEF) and Materials International Space Station Experiment (MISSE) from the Columbus laboratory module and installed them on Discovery's payload bay for return.
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SS020-E-038055 (3 Sept. 2009) --- A portion of the International Space Station is featured in this image photographed by a space walking astronaut during the STS-128 mission's second session of extravehicular activity (EVA) as construction and maintenance continue on the station. The blackness of space and Earth's horizon provide the backdrop for the scene.
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SS020-E-038470 (5 Sept. 2009) --- NASA astronaut John "Danny" Olivas, STS-128 mission specialist, participates in the mission's third and final session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the seven-hour, one-minute spacewalk, Olivas and European Space Agency astronaut Christer Fuglesang (out of frame), mission specialist, deployed the Payload Attachment System (PAS), replaced the Rate Gyro Assembly #2, installed two GPS antennae and did some work to prepare for the installation of Node 3 next year. During connection of one of two sets of avionics cables for Node 3, one of the connectors could not be mated. This cable and connector were wrapped in a protective sleeve and safed. All other cables were mated successfully.
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Between Earth and Space
Astronaut Robert L. Behnken, STS-123 mission specialist, participates in the mission's third scheduled spacewalk. During the 6-hour, 53-minute spacewalk, Behnken and Rick Linnehan installed a spare-parts platform and tool-handling assembly for Dextre, also known as the Special Purpose Dextrous Manipulator. Among other tasks, they also checked out and calibrated Dextre's end effector and attached critical spare parts to an external stowage platform. The new robotic system was activated on a power and data grapple fixture located on the Destiny laboratory on flight day nine. The blackness of space and Earth's horizon provide the backdrop for the scene. 
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Preparing for the Future
Astronaut Mike Fossum continues his duties during this the second of the STS-124mission's three scheduled spacewalk. During the seven-hour, 11-minute spacewalk, Fossum and fellow astronaut Ron Garan installed television cameras on the front and rear of the Kibo Japanese Pressurized Module (JPM) to assist Kibo robotic arm operations, removed thermal covers from the Kibo robotic arm, prepared an upper JPM docking port for flight day seven's attachment of the Kibo logistics module. 
They also readied a spare nitrogen tank assembly for its installation during the third spacewalk, retrieved a failed television camera from the Port 1 truss and inspected the port Solar Alpha Rotary Joint.
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Preparing Kibo's New Home
Astronaut Mike Fossum used a digital camera to create this self-portrait during the STS-124 mission's first scheduled spacewalk. During the six-hour, 48-minute spacewalk, Fossum and fellow astronaut Ron Garan prepared the Kibo Japanese Pressurized Module for its installation to the space station. Kibo was officially opened during a ceremony performed by astronaut Akihiko Hoshide and the Expedition 17 and STS-124 crew the following day, Wednesday, June 4, 2008.
During the spacewalk, Fossum and Garan also loosened restraints holding the Orbiter Boom Sensor System in its temporary stowage location on the space station's starboard truss, demonstrated cleaning techniques for the Solar Alpha Rotary Joint's (SARJ) race ring and installed a replacement SARJ Trundle Bearing Assembly.
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S123-E-008475 (23 March 2008) --- Astronaut Mike Foreman, STS-123 mission specialist, helps to tie down the Orbiter Boom Sensor System on the International Space Station's S1 truss during EVA 5 on March 22. The structure at the end of the boom is a transmission device for laser imagery from the laser devices used for scanning the thermal protection system.
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Dangerous Maneuvers
While anchored to a foot restraint on the end of the Orbiter Boom Sensor System, astronaut Scott Parazynski assesses his repair work as the solar array is fully deployed during the STS-120 mission's fourth spacewalk. During the 7-hour, 19-minute spacewalk, Parazynski cut a snagged wire and installed improvised stabilizers designed to strengthen the damaged solar array's structure and stability in the vicinity of the damage. 
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Building the New World
European Space Agency astronaut Hans Schlegel worked on the new Columbus laboratory during the STS-122 mission's second spacewalk. During the six-hour, 45-minute spacewalk, Schlegel and NASA astronaut Rex Walheim (out of frame) worked to replace a nitrogen tank used to pressurize the station's ammonia cooling system.
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Suiting Up
Attired in his Russian Orlan spacesuit, Russian Federal Space Agency cosmonaut Oleg Kononenko, Expedition 17 flight engineer, prepared for the July 10 spacewalk. During the full dress rehearsal "dry run" that took place on July 8, Kononenko and fellow cosmonaut Commander Sergei Volkov tested translation capability and the status of the suits' communications gear and other systems while in the Pirs Docking Compartment of the International Space Station.
Durin the 6-hour, 18-minute spacewalk, they inspected their Soyuz TMA-12 spacecraft and retrieved a pyro bolt from it. Image Credit: NASA
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Out on a Limb
Anchored to a Canadarm2 mobile foot restraint, astronaut Rick Linnehan participates in the mission's first scheduled spacewalk. During the seven-hour spacewalk, Linnehan and Expedition 16 flight engineer Garrett Reisman prepared the Japanese logistics module-pressurized section for removal from Endeavour's payload bay and installed the tool change out mechanisms on the Canadian-built Dextre robotic system, the final element of the station's Mobile Servicing System. 
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The View From Above
Visible through a window on Endeavour's aft flight deck, astronaut Rick Linnehan participates in the mission's third scheduled spacewalk. During the 6-hour, 53-minute spacewalk, Linnehan and astronaut Robert L. Behnken installed a spare-parts platform and tool-handling assembly for Dextre, also known as the Special Purpose Dextrous Manipulator. Among other tasks, they also checked out and calibrated Dextre's end effector and attached critical spare parts to an external stowage platform. The new robotic system is scheduled to be activated on a power and data grapple fixture located on the Destiny laboratory on flight day nine. 
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Quelle: NASA
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