S66-38515 (5 June 1966) --- Astronaut Eugene A. Cernan, pilot of the Gemini-9A spaceflight, is pictured outside of the spacecraft during his extravehicular activity (EVA). Photo credit: NASA

S93-37890 (October 1993) --- Astronaut Jerry M. Linenger, STS-64 mission specialist, is assisted by Steve Voyles and Kari Rueter of Boeing Aerospace prior to participating in a rehearsal for a contingency extravehicular activity (EVA). Crewmates Mark C. Lee and Carl J. Meade have used the nearby 25-feet deep pool to rehearse a spacewalk designed to test and evaluate new EVA equipment. Photo credit: NASA or National Aeronautics and Space Administration

S93-37899 (October 1993) --- Astronaut Jerry M. Linenger, STS-64 mission specialist, is assisted by Steve Voyles and Kari Rueter of Boeing Aerospace prior to participating in a rehearsal for a contingency extravehicular activity (EVA). Minutes later, Linenger was submerged in the 25-feet-deep pool in the Johnson Space Center's (JSC) Weightless Environment Training Facility (WET-F). Photo credit: NASA or National Aeronautics and Space Administration

S94-39774 (August 1994) --- Boeing's Kari Rueter checks the helmet of astronaut Mark C. Lee prior to the mission specialist's participation in an underwater rehearsal for an extravehicular activity (EVA). Lee's spacewalk is scheduled for the September STS-64 mission. New rescue gear for use on future space shuttle missions will be evaluated during the mission's single spacewalk, involving astronauts Lee and Carl J. Meade, mission specialists. Photo credit: NASA or National Aeronautics and Space Administration

S84-27232 (& Feb 1984) --- Astronaut Bruce McCandless II, 41-B mission specialist, uses his hands to control his movement above the Earth - and just few meters away from the Challenger - during the first-ever extravehicular activity (EVA) which didn?t use restrictive tethers and umbilical?s. Fellow crewmembers aboard the Challenger used a 70mm camera to expose this frame through windows on the flight deck. McCandless was joined by Robert L. Stewart, one of two other mission specialists for this flight, on two sessions of EVA.

S93-26918 (8 Sept. 1994) --- Scott Bleisath, an extravehicular activity (EVA) engineer, demonstrates the hand control module for the Simplified Aid for EVA Rescue (SAFER) system making its first flight on the scheduled September STS-64 mission. Astronauts Mark C. Lee and Carl J. Meade are the spacewalkers assigned to test the system in space. Unidentified technicians and engineers look on. Photo credit: NASA or National Aeronautics and Space Administration

S93-26920 (8 Sept. 1994) --- Scott Bleisath, an extravehicular activity (EVA) engineer, demonstrates the hand control module for the Simplified Aid for EVA Rescue (SAFER) system making its first flight on the scheduled September STS-64 mission. Astronauts Mark C. Lee and Carl J. Meade are the spacewalkers assigned to test the system in space. Photo credit: NASA or National Aeronautics and Space Administration

STS061-95-028 (6 Dec 1993) --- Astronaut Kathryn C. Thornton, on the end of the Space Shuttle Endeavour's Remote Manipulator System (RMS) arm, hovers over equipment associated with servicing chores on the Hubble Space Telescope (HST) during the second extravehicular activity (EVA) on the eleven-day mission. Astronauts Thornton and Thomas D. Akers changed out the solar array panels during this EVA.

S94-39770 (August 1994) --- Astronaut Carl J. Meade, STS-64 mission specialist, is being submerged prior to an underwater simulation of a spacewalk scheduled for his September mission. Meade, who shared the rehearsal in the Johnson Space Center's (JSC) Weightless Environment Training Facility (WET-F) pool with crewmate astronaut Mark C. Lee (partially visible at left), is equipped with a training version of new extravehicular activity (EVA) hardware called the Simplified Aid for EVA Rescue (SAFER) system. Photo credit: NASA or National Aeronautics and Space Administration

S94-39762 (August 1994) --- Astronaut Carl J. Meade, STS-64 mission specialist, listens to ground monitors prior to a simulation of a spacewalk scheduled for his September mission. Meade, who shared the rehearsal in Johnson Space Center's (JSC) Weightless Environment Training Facility (WET-F) pool with crewmate astronaut Mark C. Lee (out of frame), is equipped with a training version of new extravehicular activity (EVA) hardware called the Simplified Aid for EVA Rescue (SAFER) system. The hardware includes a mobility-aiding back harness and a chest-mounted hand control module. Photo credit: NASA or National Aeronautics and Space Administration

S66-01122 (January 1966) --- Artist concept of the Gemini-4 EVA coverlayer configuration.

S69-59525 (19 Nov. 1969) --- Overall view of activity in the Mission Operations Control Room (MOCR) in the Mission Control Center (MCC), Building 30, during the Apollo 12 lunar landing mission. When this picture was made the first Apollo 12 extravehicular activity (EVA) was being televised from the surface of the moon. Photo credit: NASA

AS12-48-7149 (20 Nov. 1969) --- A close-up view of astronaut Charles Conrad Jr., commander of the Apollo 12 lunar landing mission, photographed during the extravehicular activity (EVA) on the surface of the moon. An EVA checklist is on Conrad's left wrist. A set of tongs, an Apollo Lunar Hand Tool (ALHT), is held in his right hand. Several footprints can be seen. Astronaut Richard F. Gordon Jr., command module pilot, remained with the Command and Service Modules (CSM) in lunar orbit while astronauts Conrad and Alan L. Bean, lunar module pilot, descended in the LM to explore the moon. Note lunar soil on the suit of Conrad, especially around the knees and below.

S73-27562 (June 1973) --- Scientist-astronaut Joseph P. Kerwin, Skylab 2 science pilot, performs extravehicular activity (EVA) at the Skylab 1 and 2 space station cluster in Earth orbit, as seen in this reproduction taken from a color television transmission made by a TV camera aboard the station. Kerwin is just outside the Airlock Module. Kerwin assisted astronaut Charles Conrad Jr., Skylab 2 commander, during the successful EVA attempt to free the stuck solar array system wing on the Orbital Workshop. Photo credit: NASA

S93-46017 (13 October 1993) --- In the Johnson Space Center's (JSC) Shuttle mockup and integration laboratory, astronaut Pierre J. Thuot retrieves gear to rehearse a suit donning exercise on the middeck. Thuot's very realistic environs are provided by the Shuttle crew compartment trainer. Thuot, mission specialist, and four other NASA astronauts will spend two weeks in space aboard the Columbia in March of next year. He and astronaut Andrew M. Allen have been rehearsing contingency space walks. There is no scheduled extravehicular activity for the STS-62 flight.

S65-30428 (3 June 1965) --- Astronaut Edward H. White II, pilot on the Gemini-Titan 4 spaceflight, is shown during his egress from the spacecraft. His face is covered by a shaded visor to protect him from the unfiltered rays of the sun. White became the first American astronaut to walk in space. He remained outside the spacecraft for 21 minutes during the third revolution of the Gemini-4 mission. He wears a specially designed spacesuit for the extravehicular activity (EVA). In his right hand, he carries a Hand-Held Self-Maneuvering Unit (HHSMU) with which he controlled his movements while in space. He was attached to the spacecraft by a 25-feet umbilical line and a 23-feet tether line, both wrapped together with gold tape to form one cord. He wears an emergency oxygen supply chest pack. Astronaut James A. McDivitt is command pilot for the Gemini-4 mission. EDITOR'S NOTE: Astronaut Edward H. White II died in the Apollo/Saturn 204 fire at Cape Kennedy on Jan. 27, 1967.

S125-E-008027 (16 May 2009) --- Astronauts John Grunsfeld (left) and Andrew Feustel, both STS-125 mission specialists, give a `thumbs-up? sign on the middeck of Space Shuttle Atlantis following the mission?s third session of extravehicular activity (EVA).

Extravehicular crewmember 2 (EV2) Terry Virts is reflected in the helmet visor of EV1 Barry Wilmore during Extravehicular Activity 29 (EVA 29). Image was released by astronaut on Twitter.

The camera is reflected in his helmet visor as Extravehicular crewmember 2 (EV2) Terry Virts takes a self-portrait during Extravehicular Activity 29 (EVA 29). Image was released by astronaut on Twitter.

AS16-117-18728 (23 April 1972) --- Astronaut Charles M. Duke Jr., lunar module pilot, exposed this view of the huge "Shadow Rock" with his 70mm Hasselblad camera during the mission's third and final extravehicular activity (EVA), on April 23, 1972. This particular stop was referenced as Station 13. The scoop, a geological hand tool, leans against the rock and helps to give an idea of the size. Station 13 is a little southeast of North Ray Crater at the Descartes area. While astronauts John W. Young, commander; and Duke descended in the Apollo 16 Lunar Module (LM) "Orion" to explore the Descartes highlands landing site on the moon, astronaut Thomas K. Mattingly II, command module pilot, remained with the Command and Service Modules (CSM) "Casper" in lunar orbit.

Photographic documentation of Extravehicular Activity (EVA) 23 Prep in the Quest airlock. Astronaut Karen Nyberg, Expedition 36 flight engineer, holds a microphone and a checklist as she sits in front of the Airlock hatch.

ISS018-E-042742 (23 March 2009) --- Astronaut Joseph Acaba, STS-119 mission specialist, attired in his Extravehicular Mobility Unit (EMU) spacesuit, enters the Quest Airlock of the International Space Station as the mission?s third session of extravehicular activity (EVA) draws to a close.

ISS018-E-042748 (23 March 2009) --- Astronaut Joseph Acaba, STS-119 mission specialist, attired in his Extravehicular Mobility Unit (EMU) spacesuit, enters the Quest Airlock of the International Space Station as the mission?s third session of extravehicular activity (EVA) draws to a close.

ISS018-E-009350 (20 Nov. 2008) --- Astronaut Shane Kimbrough, STS-126 mission specialist, attired in his Extravehicular Mobility Unit (EMU) spacesuit, awaits the start of the mission's second scheduled session of extravehicular activity (EVA) in the Quest Airlock of the International Space Station.

ISS018-E-009349 (20 Nov. 2008) --- Astronaut Heidemarie Stefanyshyn-Piper, STS-126 mission specialist, attired in her Extravehicular Mobility Unit (EMU) spacesuit, prepares for the mission's second scheduled session of extravehicular activity (EVA) in the Quest Airlock of the International Space Station.

ISS018-E-041363 (21 March 2009) --- Astronaut Steve Swanson, STS-119 mission specialist, attired in his Extravehicular Mobility Unit (EMU) spacesuit, exits the Quest Airlock of the International Space Station to begin the mission's second session of extravehicular activity (EVA).

ISS018-E-009351 (20 Nov. 2008) --- Astronaut Shane Kimbrough, STS-126 mission specialist, attired in his Extravehicular Mobility Unit (EMU) spacesuit, awaits the start of the mission's second scheduled session of extravehicular activity (EVA) in the Quest Airlock of the International Space Station.

Close-up view of Expedition 39 flight engineer Rick Mastracchio at the close of Extravehicular Activity 26 (EVA 26).

S69-59538 (November 1969) --- Apollo 12 extravehicular activity (EVA-2) Traverse Overlay.

Dr. Norman E. Thagard, mission specialist for STS-7, moves through the hatchway of the mockup of the Space Shuttle orbiter which is part of JSC's weightless environment training facility (WETF). Thagard is wearing an extravehicular mobility unit and is practicing procedures used when performing an extravehicular activity (EVA) during a flight.

Flight engineer Terry Virts, Extravehicular crewmember 2 (EV2), translates External Stowage Platform 2 (ESP2) at the close of Extravehicular Activity 29 (EVA 29). An orbital sunrise provides the backdrop for this image, which was released by Virts on Twitter.

View of Rick Mastracchio,in his Extravehicular Mobility Unit (EMU),working to mate spare Pump Module (PM) Quick Disconnects (QDs) during International Space Station (ISS) Extravehicular Activity (EVA) 25. Image was released by astronaut on Twitter.

Close-up view of Expedition 39 flight engineer Steve Swanson backdropped by Earth and space at the end of Extravehicular Activity 26 (EVA 26).

Expedition 39 flight engineer Steve Swanson waves to the camera during Extravehicular Activity 26 (EVA 26) cleanup operations at the S0 Truss.

S84-27031 (7 Feb 1984) --- Astronaut Bruce McCandless II, 41-B mission specialist, reaches a maximum distance from the Challenger before reversing direction his manned maneuvering unit (MMU) and returning to the Challenger. A fellow crewmember inside the vehicle's cabin took this photograph with a 70mm camera. The untethered EVA marked the first such experience for astronauts.

ISS014-E-14467 (22 Feb. 2007) --- Cosmonaut Mikhail Tyurin, Expedition 14 flight engineer representing Russia's Federal Space Agency, wearing a Russian Orlan spacesuit, participates in a session of extravehicular activity (EVA). Among other tasks, Tyurin and astronaut Michael E. Lopez-Alegria (out of frame), commander and NASA space station science officer, were able to retract a stuck Kurs antenna on the Progress vehicle docked to the International Space Station's Zvezda Service Module.

ISS014-E-14469 (22 Feb. 2007) --- Cosmonaut Mikhail Tyurin, Expedition 14 flight engineer representing Russia's Federal Space Agency, wearing a Russian Orlan spacesuit, participates in a session of extravehicular activity (EVA). Among other tasks, Tyurin and astronaut Michael E. Lopez-Alegria (out of frame), commander and NASA space station science officer, were able to retract a stuck antenna on the Progress vehicle docked to the International Space Station's Zvezda Service Module.

STS063-67-024 (9 Feb. 1995) --- Astronauts Bernard A. Harris Jr., STS-63 payload commander, (top right) and C. Michael Foale, mission specialist, are ready to egress airlock for an extravehicular activity (EVA). Others onboard the space shuttle Discovery were astronauts James D. Wetherbee, mission commander; Eileen M. Collins, pilot; mission specialists Janice E. Voss, and cosmonaut Vladimir G. Titov. Photo credit: NASA

41G-101-014 (13 October 1984) --- Astronaut David C. Leestma, in a 35mm frame exposed by fellow mission specialist, Astronaut Kathryn D. Sullivan, participates in extravehicular activity of Oct. 11 in the Challenger's aft cargo bay. Leestma's right hand (out of frame) was inside a special work station called the orbital refueling system (ORS).

ISS036-E-017415 (8 July 2013) --- NASA astronaut Chris Cassidy (right) and European Space Agency astronaut Luca Parmitano, both Expedition 36 flight engineers, are pictured in the Quest airlock of the International Space Station as they prepare for the start of a session of extravehicular activity (EVA). Cassidy and Parmitano are wearing Extravehicular Mobility Unit (EMU) spacesuits.

ISS036-E-017423 (8 July 2013) --- NASA astronaut Chris Cassidy (right) and European Space Agency astronaut Luca Parmitano, both Expedition 36 flight engineers, are pictured in the Quest airlock of the International Space Station as they prepare for the start of a session of extravehicular activity (EVA). Cassidy and Parmitano are wearing Extravehicular Mobility Unit (EMU) spacesuits. NASA astronaut Karen Nyberg (partially obscured), flight engineer, assists her crew members.

ISS036-E-017391 (8 July 2013) --- NASA astronaut Chris Cassidy (left) and European Space Agency astronaut Luca Parmitano, both Expedition 36 flight engineers, are pictured in the Quest airlock of the International Space Station as they prepare for the start of a session of extravehicular activity (EVA). Cassidy and Parmitano are wearing Extravehicular Mobility Unit (EMU) spacesuits.

ISS036-E-017393 (8 July 2013) --- NASA astronaut Chris Cassidy (left) and European Space Agency astronaut Luca Parmitano, both Expedition 36 flight engineers, are pictured in the Quest airlock of the International Space Station as they prepare for the start of a session of extravehicular activity (EVA). Cassidy and Parmitano are wearing Extravehicular Mobility Unit (EMU) spacesuits. NASA astronaut Karen Nyberg, flight engineer, assists her crew members.

ISS036-E-017389 (8 July 2013) --- NASA astronaut Chris Cassidy (left) and European Space Agency astronaut Luca Parmitano, both Expedition 36 flight engineers, are pictured in the Quest airlock of the International Space Station as they prepare for the start of a session of extravehicular activity (EVA). Cassidy and Parmitano are wearing Extravehicular Mobility Unit (EMU) spacesuits. NASA astronaut Karen Nyberg, flight engineer, assists her crew members.

ISS018-E-009352 (20 Nov. 2008) --- Astronauts Shane Kimbrough (left) and Heidemarie Stefanyshyn-Piper, both STS-126 mission specialists, attired in their Extravehicular Mobility Unit (EMU) spacesuit, prepare for the mission's second scheduled session of extravehicular activity (EVA) in the Quest Airlock of the International Space Station. Astronaut Chris Ferguson, commander, assisted Kimbrough and Piper.

Astronaut Charles Conrad Jr., commander, uses the lunar equipment conveyer (LEC) at the Lunar Module during the Apollo 12 extravehicular activity on the lunar surface. This photograph was taken by Astronaut Alan L. Bean, lunar module pilot.

S65-30430 (3 June 1965) --- Astronaut Edward H. White II, pilot on the Gemini-Titan 4 spaceflight, is shown during his egress from the spacecraft. His face is covered by a shaded visor to protect him from the unfiltered rays of the sun. White became the first American astronaut to walk in space. He remained outside the spacecraft for 21 minutes during the third revolution of the Gemini-4 mission. He wears a specially designed spacesuit for the extravehicular activity (EVA). In his right hand, he carries a Hand-Held Self-Maneuvering Unit (HHSMU) with which he controlled his movements while in space. He was attached to the spacecraft by a 25-feet umbilical line and a 23-feet tether line, both wrapped together with gold tape to form one cord. He wears an emergency oxygen supply chest pack. Astronaut James A. McDivitt is command pilot for the Gemini-4 mission. Photo credit: NASA EDITOR'S NOTE: Astronaut Edward H. White II died in the Apollo/Saturn 204 fire at Cape Kennedy on Jan. 27, 1967.

S72-44420 (8 June 1972) --- Astronaut Eugene A. Cernan, commander of the Apollo 17 lunar landing mission, prepares to remove a traverse gravimeter training mock-up from a Lunar Roving Vehicle for deployment during lunar surface extravehicular activity simulations at the Kennedy Space Center (KSC), Florida.

ISS037-E-029029 (5 Nov. 2013) --- In the International Space Station?s Pirs docking compartment, Russian cosmonaut Oleg Kotov, Expedition 37 flight engineer, wearing his Russian Orlan spacesuit, prepares for a session of extravehicular activity (EVA) scheduled for Nov. 9, 2013.

S72-44422 (8 Sept. 1972) --- Scientist-astronaut Harrison H. "Jack" Schmitt, lunar module pilot of the Apollo 17 lunar landing mission, is suited up in preparation for lunar surface extravehicular activity simulations at the Kennedy Space Center, Florida.

ISS037-E-029014 (5 Nov. 2013) --- In the International Space Station?s Pirs docking compartment, Russian cosmonaut Sergey Ryazanskiy, Expedition 37 flight engineer, wearing his Russian Orlan spacesuit, prepares for a session of extravehicular activity (EVA) scheduled for Nov. 9, 2013.

ISS037-E-029081 (5 Nov. 2013) --- In the International Space Station?s Pirs docking compartment, Russian cosmonauts Oleg Kotov (left) and Sergey Ryazanskiy, both Expedition 37 flight engineers, wearing their Russian Orlan spacesuits, prepare for a session of extravehicular activity (EVA) scheduled for Nov. 9, 2013.

S69-18547 (1969) --- North American Rockwell artist's concept illustrating a part of the planned Apollo 9 extravehicular activity on the fourth day of the mission as the Command and Service Modules are docked to the Lunar Module. The figure performing the EVA represents astronaut Russell L. Schweickart, Apollo 9 lunar module pilot.

ISS018-E-041421 (21 March 2009) --- Astronaut Joseph Acaba, STS-119 mission specialist, attired in his Extravehicular Mobility Unit (EMU) spacesuit, is pictured in the Quest Airlock of the International Space Station as the mission?s second session of extravehicular activity (EVA) draws to a close.

ISS018-E-041443 (21 March 2009) --- Attired in his Extravehicular Mobility Unit (EMU) spacesuit, astronaut Joseph Acaba, STS-119 mission specialist, is pictured in the Quest Airlock of the International Space Station as the mission's second session of extravehicular activity (EVA) draws to a close.

ISS018-E-041420 (21 March 2009) --- Astronaut Joseph Acaba, STS-119 mission specialist, attired in his Extravehicular Mobility Unit (EMU) spacesuit, is pictured in the Quest Airlock of the International Space Station as the mission?s second session of extravehicular activity (EVA) draws to a close.

ISS018-E-041348 (21 March 2009) --- Astronaut Joseph Acaba, STS-119 mission specialist, attired in his Extravehicular Mobility Unit (EMU) spacesuit, waves as he prepares to leave the Quest Airlock of the International Space Station to begin the mission's second session of extravehicular activity (EVA).

ISS018-E-041448 (21 March 2009) --- Attired in his Extravehicular Mobility Unit (EMU) spacesuit, astronaut Steve Swanson, STS-119 mission specialist, is pictured in the Quest Airlock of the International Space Station as the mission's second session of extravehicular activity (EVA) draws to a close.

AS09-20-3094 (6 March 1969) --- Astronaut Russell L. Schweickart, lunar module pilot, stands in "golden slippers" on the Lunar Module porch during his extravehicular activity on the fourth day of the Apollo 9 Earth-orbital mission. This photograph was taken from inside the Lunar Module "Spider". The Command and Service Modules were docked to the LM. Schweickart is wearing an Extravehicular Mobility Unit (EMU). Inside the "Spider" was astronaut James A. McDivitt, Apollo 9 crew commander. Astronaut David R. Scott, command module pilot, remained at the controls of the Command Module, "Gumdrop."

Astronauts Jerry L. Ross (left) and Sherwood C. (Woody) Spring are photographed as they assemble pieces of the Experimental Assembly of Structures in Extravehicular Activities (EASE) device in the open payload bay. The Canadian-built remote manipulator system (RMS) arm (partially obscured in the right portion of the frame) is in position to allow television cameras to record the activity.

STS061-65-015 (9 Dec 1993) --- A fish-eye lens was used to capture the Hubble Space Telescope (HST), a spherical Earth and Australian landmass with a bit of distortion during the final extravehicular activity (EVA) on the STS-61 HST-servicing mission. Astronaut F. Story Musgrave can be seen at bottom of the frame.

S94-40051 (1 August 1994) --- Attired in a training version of the Extravehicular Mobility Unit (EMU), astronaut Scott E. Parazynski, mission specialist, prepares to be submerged in a 25-feet deep pool at the Johnson Space Center's (JSC) Weightless Environment Training Facility (WET-F). Though no extravehicular activity (EVA) is planned for the mission, at least two astronauts are trained to perform tasks that would require a space walk in the event of failure of remote systems. In November, Parazynski will join four other NASA astronauts and a European mission specialist for a week and a half in space aboard the Space Shuttle Atlantis. The flight will support the Atmospheric Laboratory for Applications and Science (ATLAS-3) mission.

AS16-117-18826 (23 April 1972) --- Astronaut John W. Young collects samples at the North Ray Crater geological site during the mission's third and final Apollo 16 extravehicular activity (EVA). He has a rake in his hand, and the gnomon is near his foot. Note how soiled Young's Extravehicular Mobility Unit (EMU) is. While astronauts Young, commander; and Charles M. Duke Jr., lunar module pilot; descended in the Apollo 16 Lunar Module (LM) "Orion" to explore the Descartes highlands landing site on the moon, astronaut Thomas K. Mattingly II, command module pilot, remained with the Command and Service Modules (CSM) "Casper" in lunar orbit.

S94-40049 (1 August 1994) --- Attired in a training version of the Extravehicular Mobility Unit (EMU), astronaut Joseph R. Tanner, mission specialist, prepares to be submerged in a 25-feet deep pool at the Johnson Space Center's (JSC) Weightless Environment Training Facility (WET-F). Though no extravehicular activity (EVA) is planned for the mission, at least two astronauts are trained to perform tasks that would require a space walk in the event of failure of remote systems. In November, Tanner will join four other NASA astronauts and a European mission specialist for a week and a half in space aboard the Space Shuttle Atlantis. The flight will support the Atmospheric Laboratory for Applications and Science (ATLAS-3) mission.

STS054-S-033 (17 Jan 1993) --- Runco works with a mobile foot restraint during extravehicular activity (EVA) in Endeavour's cargo bay. The scene was downlinked at 11:52:04:28 GMT, Jan. 17, 1993.

ISS018-E-039327 (10 March 2009) --- The Russian segment of the International Space Station is featured in this image photographed by an Expedition 18 crewmember during extravehicular activity (EVA).

ISS018-E-039326 (10 March 2009) --- The Russian segment of the International Space Station is featured in this image photographed by an Expedition 18 crewmember during extravehicular activity (EVA).

Astronaut James H. Newman, mission specialist, uses a 35mm camera to take a picture of fellow astronaut Carl E. Walz (out of frame) in Discovery's cargo bay. The two were engaged in an extravehicular activity (EVA) to test equipment to be used on future EVA's. Newman is tethered to the starboard side, with the orbital maneuvering system (OMS) pod just behind him.

51I-44-014 (31 Aug-1 Sept. 1985) --- This photograph is one of a series of six covering extravehicular activity (EVA) which were released by NASA on Sept. 4, 1985. Here, astronaut James D. van Hoften, dwarfed by the large satellite, moves in for initial contact. Astronaut John M. (Mike) Lounge, out of frame inside cabin, maneuvers the remote manipulator system (RMS) arm to assist astronauts van Hoften and William F. Fisher. Photo credit: NASA

51I-102-033 (31 August - 1 September 1985) --- This is one of a series of six photographs released by NASA covering the extravehicular activity (EVA) of astronauts James D. van Hoften and William F. Fisher, who helped to capture, repair and release the previously errant Syncom IV-3 communications satellite. Here, Dr. van Hoften has just given a shove to the the Syncom. (For orientation, moon should be in lower right quadrant).

51I-102-029 (31 August - 1 September 1985) --- This is one of a series of six photographs released by NASA covering the extravehicular activity (EVA) of astronauts James D. van Hoften and William F. Fisher, who helped to capture, repair and release the previously errant Syncom IV-3 communications satellite. Here, Dr. van Hoften has just given a shove to the the Syncom. (For orientation, moon should be in lower right quadrant).

View of the SpaceX Dragon Commercial Resupply Services-3 (CRS-3) spacecraft and portions of the Destiny U.S. Laboratory and Harmony Node 2 taken against a backdrop of Earth and space by Extravehicular crewmember 1 (EV1) during Extravehicular Activity 26 (EVA 26).

ISS036-E-017441 (8 July 2013) --- NASA astronaut Karen Nyberg, Expedition 36 flight engineer, uses a computer in the International Space Station’s Quest airlock while the crew prepares for a July 9 session of extravehicular activity (EVA) with NASA astronaut Chris Cassidy and European Space Agency astronaut Luca Parmitano, both flight engineers. Russian cosmonaut Pavel Vinogradov, commander, is visible in the background.

ISS018-E-041352 (21 March 2009) --- Astronaut Tony Antonelli, STS-119 pilot, watches his crewmates through a small window on the hatch door in the Quest Airlock of the International Space Station while Space Shuttle Discovery remains docked with the station. Astronauts Joseph Acaba and Steve Swanson, both STS-119 mission specialists, were exiting the airlock to begin the mission's second session of extravehicular activity (EVA).

ISS018-E-041355 (21 March 2009) --- Astronaut Tony Antonelli, STS-119 pilot; and Japan Aerospace Exploration Agency (JAXA) astronaut Koichi Wakata, Expedition 18 flight engineer, watch their crewmates through a small window on the hatch door in the Quest Airlock of the International Space Station while Space Shuttle Discovery remains docked with the station. Astronauts Joseph Acaba and Steve Swanson, both STS-119 mission specialists, were exiting the airlock to begin the mission's second session of extravehicular activity (EVA).

ISS036-E-017438 (8 July 2013) --- NASA astronaut Karen Nyberg, Expedition 36 flight engineer, speaks into a microphone in the International Space Station’s Quest airlock while the crew prepares for a July 9 session of extravehicular activity (EVA) with NASA astronaut Chris Cassidy and European Space Agency astronaut Luca Parmitano, both flight engineers.

STS061-098-000K (8 Dec. 1993) --- Astronaut Kathryn C. Thornton works with equipment associated with servicing chores on the Hubble Space Telescope (HST) during the fourth extravehicular activity (EVA) on the eleven-day mission.

S68-55391 (11 Dec. 1968) --- Astronaut Russell L. Schweickart, lunar module pilot of the Apollo 9 (Spacecraft 104/Lunar Module 3/Saturn 504) space mission, is seen inside Chamber "A," Space Environment Simulation Laboratory, Building 32, participating in dry run activity in preparation for extravehicular activity which is scheduled in Chamber "A." The purpose of the scheduled training is to familiarize the crewmen with the operation of EVA equipment in a simulated space environment. In addition, metabolic and workload profiles will be simulated on each crewman. Astronauts Schweickart and Alan L. Bean, backup lunar module pilot, are scheduled to receive thermal-vacuum training simulating Earth-orbital EVA.

AS09-19-2994 (6 March 1969) --- Astronaut Russell L. Schweickart, lunar module pilot, is photographed from the Command Module (CM) "Gumdrop" during his extravehicular activity (EVA) on the fourth day of the Apollo 9 Earth-orbital mission. He holds, in his right hand, a thermal sample which he is retrieving from the Lunar Module (LM) exterior. The Command and Service Modules (CSM) and LM "Spider" are docked. Schweickart, wearing an Extravehicular Mobility Unit (EMU), is standing in "golden slippers" on the LM porch. Visible on his back are the Portable Life Support System (PLSS) and Oxygen Purge System (OPS). Astronaut James A. McDivitt, Apollo 9 commander, was inside the "Spider". Astronaut David R. Scott, command module pilot, remained at the controls in the CM "Gumdrop".

S84-36958 (29 June 1984) --- Astronaut Robert L. Crippen, 41-G crew commander, perches nearby an underwater simulation scene in the Johnson Space Center's weightless environment training facility (WET-F). Purpose of the rehearsal was to train two of the 41-G crew's mission specialists for a scheduled extravehicular activity (EVA). Out of frame are Astronauts Kathryn D. Sullivan, Jon A. McBride and David Leestma. Dr. Sullivan and Leestma donned extravehicular mobility units (EMU) for the simulation while Crippen and McBride monitored the activity. This photograph was taken by Otis Imboden.

S84-33898 (21 May 1984) --- Astronaut Jon A. McBride, 41-G pilot, assists his crewmate, Astronaut Kathryn D. Sullivan with the glove portion of her extravehicular mobility unit (EMU) prior to Dr. Sullivan's underwater session in the Johnson Space Center's weightless environment training facility (WET-F). Mission specialists Sullivan and David C. Leestma are scheduled for extravehicular activity (EVA) on the Columbia for NASA's 17th scheduled flight.

AS16-117-18825 (23 April 1972) --- Astronaut John W. Young, Apollo 16 commander, with a sample bag in his left hand, moves toward the bottom part of the gnomon (center) while collecting samples at the North Ray Crater geological site. Note how soiled Young's Extravehicular Mobility Unit (EMU) is during this the third and final Apollo 16 extravehicular activity (EVA). The Lunar Roving Vehicle (LRV) is parked at upper left.

ISS018-E-041237 (19 March 2009) --- Astronaut Richard Arnold, STS-119 mission specialist, attired in his Extravehicular Mobility Unit (EMU) spacesuit, and astronaut Lee Archambault, STS-119 commander, shake hands in the Quest Airlock of the International Space Station as the mission's first scheduled session of extravehicular activity (EVA) draws to a close. Astronaut Michael Fincke, Expedition 18 commander, is visible at top.

ISS018-E-041435 (21 March 2009) --- Attired in his Extravehicular Mobility Unit (EMU) spacesuit, astronaut Joseph Acaba, STS-119 mission specialist, is pictured in the Quest Airlock of the International Space Station as the mission's second session of extravehicular activity (EVA) draws to a close. Astronaut Tony Antonelli, STS-119 pilot, assists with the doffing of the spacesuit. Astronaut Michael Fincke, Expedition 18 commander, is visible in the background.

ISS018-E-041263 (19 March 2009) --- Astronauts Michael Fincke (foreground), Expedition 18 commander; and Tony Antonelli, STS-119 pilot, assist astronaut Steve Swanson, STS-119 mission specialist, with the doffing of his Extravehicular Mobility Unit (EMU) spacesuit in the Quest Airlock of the International Space Station as the mission's first scheduled session of extravehicular activity (EVA) draws to a close.

ISS018-E-041214 (19 March 2009) --- Astronauts Steve Swanson (right) and Richard Arnold, both STS-119 mission specialists, attired in their Extravehicular Mobility Unit (EMU) spacesuits, are pictured in the Quest Airlock of the International Space Station as the mission's first scheduled session of extravehicular activity (EVA) draws to a close. Astronauts Michael Fincke (partially out of frame), Expedition 18 commander; and Tony Antonelli, STS-119 pilot, assist with the doffing of the spacesuits.

ISS018-E-041344 (21 March 2009) --- Astronaut Steve Swanson, STS-119 mission specialist, attired in his Extravehicular Mobility Unit (EMU) spacesuit, prepares for the mission's second session of extravehicular activity (EVA) in the Quest Airlock of the International Space Station while Space Shuttle Discovery remains docked with the station. Astronauts Tony Antonelli (left), STS-119 pilot; and Japan Aerospace Exploration Agency?s (JAXA) Koichi Wakata, Expedition 18 flight engineer, assist Swanson.

ISS018-E-041234 (19 March 2009) --- Astronaut Steve Swanson, STS-119 mission specialist, attired in his Extravehicular Mobility Unit (EMU) spacesuit, and astronaut Lee Archambault, STS-119 commander, shake hands in the Quest Airlock of the International Space Station as the mission's first scheduled session of extravehicular activity (EVA) draws to a close. Astronaut Michael Fincke, Expedition 18 commander, is visible at top left.

ISS018-E-041208 (19 March 2009) --- Astronauts Steve Swanson (right) and Richard Arnold, both STS-119 mission specialists, attired in their Extravehicular Mobility Unit (EMU) spacesuits, are pictured in the Quest Airlock of the International Space Station as the mission's first scheduled session of extravehicular activity (EVA) draws to a close. Astronauts Michael Fincke (center background), Expedition 18 commander; and Tony Antonelli, STS-119 pilot, assist with the doffing of the spacesuits.

ISS018-E-041428 (21 March 2009) --- Attired in his Extravehicular Mobility Unit (EMU) spacesuit, astronaut Steve Swanson, STS-119 mission specialist, is pictured in the Quest Airlock of the International Space Station as the mission's second session of extravehicular activity (EVA) draws to a close. Astronaut Tony Antonelli, STS-119 pilot, assists with the doffing of the spacesuit.

ISS018-E-041080 (19 March 2009) --- Astronauts Steve Swanson (right) and Richard Arnold, both STS-119 mission specialists, attired in their Extravehicular Mobility Unit (EMU) spacesuits, are pictured in the Quest Airlock of the International Space Station as the mission's first scheduled session of extravehicular activity (EVA) draws to a close. Astronaut Tony Antonelli, pilot, assists with the doffing of the spacesuits.

ISS018-E-041243 (19 March 2009) --- Astronauts Steve Swanson (right) and Richard Arnold, both STS-119 mission specialists, attired in their Extravehicular Mobility Unit (EMU) spacesuits, are pictured in the Quest Airlock of the International Space Station as the mission's first scheduled session of extravehicular activity (EVA) draws to a close. Astronauts Michael Fincke (top center), Expedition 18 commander; and Tony Antonelli, STS-119 pilot, assist with the doffing of the spacesuits.

41C-22-885 (8 April 1984) --- The 35mm camera was used to photograph this scene of Astronaut George D. Nelson, STS-41C mission specialist, as he uses the manned maneuvering unit (MMU) to make an excursion to the plagued Solar Maximum, Mission Satellite (SMMS)._Astronaut James D. van Hoften remained in the Challenger's cargo bay during the April 8 extravehicular activity (EVA).

S68-34582 (1968) --- With its exterior removed, the Apollo portable life support system (PLSS) can be easily studied. The PLSS is worn as a backpack over the Extravehicular Mobility Unit (EMU) a multi-layered spacesuit used for outside-the-spacecraft activity. JSC photographic frame no. S68-34582 is a wider view of the exposed interior working parts of the PLSS and its removed cover.

S68-34580 (1968) --- With its exterior removed, the Apollo portable life support system (PLSS) can be easily studied. The PLSS is worn as a backpack over the Extravehicular Mobility Unit (EMU), a multi-layered spacesuit used for outside-the-spacecraft activity. JSC photographic frame no. S68-34582 is a close-up view of the working parts of the PLSS.

AS12-47-6919 (19 Nov. 1969) --- Astronaut Alan L. Bean, lunar module pilot, deploys components of the Apollo Lunar Surface Experiments Package (ALSEP) during the first Apollo 12 extravehicular activity (EVA) on the moon. The photo was made by astronaut Charles Conrad Jr., commander, using a 70mm handheld Hasselblad camera modified for lunar surface usage.

S73-31323 (30 June 1973) --- Astronaut Jack R. Lousma, Skylab 3 pilot, practices procedures for extravehicular activity (EVA) in his Extravehicular Mobility Unit (EMU) spacesuit during Skylab 3 prelaunch training at Johnson Space Center. He is working with a mock-up of a trunion plug plate which is on the space station's deployment assembly. Photo credit: NASA

STS054-S-034 (17 Jan 1993) --- Closeup view of Runco as he works to install a mobile foot restraint during extravehicular activity (EVA) in Endeavour's cargo bay. The scene was downlinked at 11:55:07:24 GMT, Jan. 17, 1993.

Astronauts Jerry L. Ross (right) and Sherwood C. (Woody) Spring (left) share a foot restraint as they survey the assembled ACCESS components after a lengthy extravehicular activity. Both men salute the American flag placed on the assembled ACCESS tower. Stowed EASE pieces are reflected in the window through which the photo was taken.

ISS040-E-015679 (19 June 2014) --- Russian cosmonauts Alexander Skvortsov (red stripes) and Oleg Artemyev, both Expedition 40 flight engineers, participate in a session of extravehicular activity (EVA) as work continues on the International Space Station. During the seven-hour, 23-minute spacewalk Skvortsov and Artemyev completed installation and experiment tasks outside the station’s Russian segment. The ISS Progress 55 resupply vehicle, docked to the Pirs Docking Compartment, is visible at center. The blackness of space and Earth’s horizon provide the backdrop for the scene.