ISS040-E-010971 (12 June 2014) --- European Space Agency astronaut Alexander Gerst, Expedition 40 flight engineer, performs a checkout on an Extravehicular Mobility Unit (EMU) spacesuit in the Quest airlock of the International Space Station.

ISS040-E-010972 (12 June 2014) --- European Space Agency astronaut Alexander Gerst, Expedition 40 flight engineer, uses a computer while working on an Extravehicular Mobility Unit (EMU) spacesuit in the Quest airlock of the International Space Station.

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.

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).

STS061-38-014 (9 Dec 1993) --- Astronaut F. Story Musgrave gets assistance from astronaut Thomas D. Akers while suiting up for the final space walk on the eleven-day, Hubble Space Telescope (HST) servicing mission. Musgrave joined astronaut Jeffrey A. Hoffman (out of frame) on three space walks, while Akers teamed with astronaut Kathryn D. Thornton for two.

STS006-10-417 (7 April 1983) --- Astronauts F. Story Musgrave, left, and Donald H. Peterson float about in the cargo bay of the Earth-orbiting space shuttle Challenger during their April 7, 1983, extravehicular activity (EVA). Their "floating about" is restricted via tethers to safety slide wires. Thanks to the tether/slide wire combination, Peterson is able to translate along the port side hand rails. Musgrave is near the Airborne Support Equipment (ASE) for the now vacated Inertial Upper Stage (IUS). Clouds can be seen in the background. Photo credit: NASA

41G-13-032 (11 Oct. 1984) --- Astronaut Kathryn D. Sullivan checks the latch of the SIR-B antenna in the space shuttle Challenger's open cargo bay during her historic extravehicular activity (EVA) on Oct. 11, 1984. Earlier, America's first woman to perform an EVA and astronaut David C. Leestma, participated in an in-space simulation of refueling a spacecraft in orbit. The Orbital Refueling System (ORS) is just beyond the astronaut mission specialist's helmet. To the left is the Large Format Camera (LFC). The LFC and ORS are stationed on a device called the Mission Peculiar Support Structure (MPESS). Crew members consisted of astronauts Robert L. Crippen, commander; Jon A. McBride, pilot; along with Kathryn D. Sullivan, Sally K. Ride, and David D. Leestma, all mission specialists; and Canadian astronaut Marc Garneau and Paul D. Scully-Power, both payload specialist. EDITOR'S NOTE: The STS-41G mission had the first American female EVA (Sullivan); first seven-person crew; first orbital fuel transfer; and the first Canadian (Garneau).

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."

51I-S-237 (1 Sept. 1985) --- A still photo made from a video downlink shows astronaut James D. van Hoften, just after giving a shove to the Syncom IV-3 communications satellite. NASA's 51-I astronaut crew aboard the space shuttle Discovery had earlier captured and repaired the previously errant satellite. Photo credit: NASA

S84-43432 (11 Oct. 1984) --- Appearing small in the center background of this image, astronauts Kathryn D. Sullivan, left, and David C. Leestma, both 41-G mission specialists, perform an in-space simulation of refueling another spacecraft in orbit. Their station on the space shuttle Challenger is the orbital refueling system (ORS), positioned on the mission peculiar support structure (MPR ESS). The Large Format Camera (LFC) is left of the two mission specialists. In the left foreground is the antenna for the shuttle imaging radar (SIR-B) system onboard. The Canadian-built remote manipulator system (RMS) is positioned to allow close-up recording capability of the busy scene. A 50mm lens on a 70mm camera was used to photograph this scene. Photo credit: NASA

51D-04-025 (16 April 1985) --- Bearing a maze of interesting reflections, this aquarium-like scene came during one of the lighter moments of emergency extravehicular activity (EVA) aboard the Earth-orbiting Space Shuttle Discovery. Astronaut S. David Griggs, waving from the cargo bay into the flight deck, earlier participated with astronaut Jeffrey A. Hoffman in the successful attachment of two special tools to the end of the Canadian-built Remote Manipulator System (RMS) arm. The Earth's horizon appears both in the background of the scene and in the reflection in Griggs' helmet visor.

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).

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".

STS089-364-019 (22-31 Jan. 1998) --- Astronaut Terrence W. (Terry) Wilcutt, STS-89 mission commander, adjusts a camcorder onboard the Earth-orbiting space shuttle Endeavour. The Primary Life Support System (PLSS) for an Extravehicular Mobility Unit (EMU) is stored nearby. Though no extravehicular activity (EVA) was planned for the nine-day mission, the EMU spacesuit was carried onboard in the event a contingency EVA was required. Photo credit: NASA

View of NASA astronaut Chris Cassidy (left) and European Space Agency astronaut Luca Parmitano (right), Expedition 36 flight engineers, preparing for a dry run in the International Space Stations Quest airlock in preparation for the first of two sessions of extravehicular (EVA) scheduled for July 9 and July 16. Both have donned their EMUs. Astronaut Karen Nyberg, Expetition 36 flight engineer, is visible in the center.

51I-07-015 (4-5 Sept 1985) --- All five STS 51-I crewmembers pose with one of two extravehicular mobility unit (EMU) spacesuits used by Astronauts van Hoften and Fisher on their two-day EVA.

ISS040-E-080769 (28 July 2014) --- NASA astronauts Steve Swanson (left), Expedition 40 commander, and Reid Wiseman, flight engineer, work in tandem to perform in-flight maintenance on an Extravehicular Mobility Unit (EMU) spacesuit in the Quest airlock of the International Space Station.

European Space Agency astronaut Luca Parmitano (left) and Astronaut Chris Cassidy,both Expedition 36 flight engineers,pose for a candid photo with Extravehicular Mobility Unit (EMU) hardware in the Quest Airlock.

ISS014-E-13528 (8 Feb. 2007) --- Astronauts Sunita L. Williams, flight engineer, and Michael A. Lopez-Alegria, commander and NASA ISS science officer, don their extravehicular mobility unit (EMU) space suits onboard the International Space Station prior to one of several Expedition 14 spacewalks. This marks the third extravehicular activity in nine days.

ISS038-E-019271 (20 Dec. 2013) --- In the Quest airlock onboard the Earth-orbiting International Space Station, on the eve of their first spacewalk together, NASA astronauts Rick Mastracchio, right, and Mike Hopkins are completely suited in their extravehicular mobility unit spacesuits. NASA has scheduled at least two sessions of extravehicular activity for the two flight engineers to troubleshoot a faulty coolant pump on the orbital outpost.

S125-E-007803 (15 May 2009) --- Judging by his countenance, astronaut Michael Good onboard the Space Shuttle Atlantis is enjoying his first experience not only in space but in participating in a very important space walk, as well. The mission specialist is lacking the gloves, helmet and outer torso part of the extravehicular mobility unit space suit, but he is wearing the pants portion. Astronauts Good and Mike Massimino successfully completed the second of five scheduled sessions of extravehicular activity for this crew.

61B-41-019 (26 Nov. ? 3 Dec. 1985) --- Astronaut Jerry L. Ross, one of NASA flight 6l-B's mission specialists, approaches a tower device just erected by Ross and astronaut Sherwood (Woody) C. Spring during the second of two extravehicular activities. The tower was called Assembly Concept for Construction of Erectable Space Structures. Ross is secured on a foot restraint device connected to the Canadian-built remote manipulator system (RMS) arm aboard the Earth orbiting Atlantis.

The darkness of space forms the backdrop for this extravehicular activity (EVA) scene captured by one of the STS-57 crewmembers in Endeavour's, Orbiter Vehicle (OV) 105's, crew cabin. Pictured near the recently "captured" European Retrievable Carrier (EURECA) at frame center is Mission Specialist (MS) and Payload Commander (PLC) G. David Low. Suited in an extravehicular mobility unit (EMU), Low, anchored to the remote manipulator system (RMS) via a portable foot restraint (PFR) (manipulator foot restraint (MFR)), is conducting Detailed Test Objective (DTO) 1210 procedures. Specifically, this activity will assist in refining several procedures being developed to service the Hubble Space Telescope (HST) on mission STS-61 in December 1993. The PFR is attached to the RMS end effector via a PFR attachment device (PAD). Partially visible in the foreground is the Superfluid Helium Onorbit Transfer (SHOOT) payload.

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.

Astronaut Sherwood C. Spring, anchored to the foot restraint on the remote manipulator system (RMS) arm, checks joints on the tower-like Assembly Concept for Construction of Erectable Space Structures (ACCESS) device extending from the payload bay as the Atlantis flies over white clouds and blue ocean waters. The Gulf of Mexico waters form the backdrop for the scene.

STS051-34-028 (16 Sept. 1993) --- This unusual scene of Extravehicular Activity (EVA) was captured on 35mm film by one of the supportive in-cabin crew members. Astronaut James H. Newman, working on the Space Shuttle Discovery's starboard side, is nearer the camera, with astronaut Carl E. Walz traversing near the aft firewall and the Airborne Support Equipment (ASE).

51I-102-048 (4-5 Sept 1985) --- A 35mm frame showing astronaut William F. Fisher standing on the edge of Discovery's cargo bay (in foot restraint) during the second day of a two-day effort to capture, repair and re-release the Syncom IV-3 communications satellite. Astronaut James D. van Hoften, standing on the Discovery's RMS arm, exposed the frame.

41C-37-1711 (11 April 1984) --- The two mission specialist-EVA participants of Flight 41-C share a repair task at the "captured" Solar Maximum Mission Satellite (SMMS) in the aft end of the Challenger's cargo bay. Astronauts George D. Nelson, right, and James D. van Hoften uses the mobile foot restraint and the Remote Manipulator System (RMS) as a "cherry picker" device for moving about. Later, the RMS lifted the SMMS into space once more.

61B-41-047 (1 Dec 1985) --- Astronauts Jerry L. Ross (left) and Sherwood C. (Woody) Spring are photographed by Astronaut Bryan D. O'Connor as they continue to assemble more pieces of the EASE (Experimental Assembly of Structures in Extravehicular Activities) device during the week-long STS 61-B mission. This frame is one of a series covering the structure's build-up.

STS049-91-029 (13 May 1992) --- Following the successful capture of Intelsat VI satellite, three astronauts continue their chores toward moving the 4.5 ton communications satellite into the space shuttle Endeavour's cargo bay. A fellow crew member recorded this 70mm still frame from inside Endeavour's cabin. Left to right, astronauts Richard J. Hieb, Thomas D. Akers and Pierre J. Thuot, cooperate on the effort to attach a specially designed grapple bar underneath the satellite. Thuot stands on the end of the Remote Manipulator System's (RMS) arm while Hieb and Akers are on Portable Foot Restraints (PFR) affixed to Endeavour's portside and the Multipurpose Support Structure (MPESS), respectively. The sections of Earth which form the backdrop for the scene are blanketed with thousands of square miles of clouds. Photo credit: NASA

With the Caribbean Sea and part of the Bahama Islands chain as a backdrop, two STS-51 crewmembers evaluate procedures and gear to be used on the upcoming Hubble Space Telescope (HST)-servicing mission. Sharing the lengthy extravehicular activity in and around Discovery's cargo bay were astronauts James H. Newman (left), and Carl E. Walz, mission specialists.

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.

STS049-91-026 (13 May 1992) --- Three astronauts hold onto the 4.5-ton Intelsat VI satellite after a six-handed "capture" was made minutes earlier. Left to right are astronauts Richard J. Hieb, Thomas D. Akers and Pierre J. Thuot. Thuot stands on the end of the remote manipulator system arm, from which he had made two earlier unsuccessful grapple attempts on two-person extravehicular activity sessions. Ground controllers and crew members agreed that a third attempt, using three mission specialists in the cargo bay of the space shuttle Endeavour, was the effort needed to accomplish the capture feat.

STS057-32-008 (25 June 1993) --- Astronaut G. David Low (nearer camera), his feet anchored to Endeavour's Remote Manipulator System (RMS), lifts fellow astronaut Peter J. K. (Jeff) Wisoff during a special phase of the lengthy June 25, 1993, extravehicular activity (EVA). This phase of the EVA dealt with the simulation of handling large components in space. This particular task was rehearsed with eyes toward the servicing of the Hubble Space Telescope (HST) in the near future or the assembly and maintenance of the International Space Station later. The two mission specialists and four other NASA astronauts spent almost ten days aboard the Space Shuttle Endeavour in Earth-orbit supporting the SPACEHAB mission, retrieving the European Retrievable Carrier (EURECA) and conducting various experiments.

61B-102-022 (1 Dec 1985) --- Astronaut Jerry L. Ross, anchored to the foot restraint on the remote manipulator system (RMS), holds onto the tower-like Assembly Concept for Construction of Erectable Space Structures (ACCESS) device, as the Atlantis flies over white clouds and blue ocean waters. The frame was exposed with a negative-equipped camera held by Astronaut Sherwood C. Spring, who was also on the EVA-task.

STS049-77-028 (14 May 1992) --- Astronaut Thomas D. Akers, STS-49 mission specialist, grabs a strut device as fourth period of extravehicular activity (EVA) gets underway in the Space Shuttle Endeavour's cargo bay. Akers is positioned near the Multi-purpose Support Structure (MPESS). The purpose of the final EVA on this nine-day mission was the evaluation of Assembly of Station by EVA Methods (ASEM). The scene was recorded on 70mm film by a fellow crew member in the space shuttle's cabin. Astronaut Kathryn C. Thornton (out of frame) joined Akers on the 7 1/2 hour EVA.

AS09-20-3064 (6 March 1969) --- Excellent view of the docked Apollo 9 Command and Service Modules (CSM) and Lunar Module (LM), with Earth in the background, during astronaut David R. Scott's stand-up extravehicular activity (EVA), on the fourth day of the Apollo 9 Earth-orbital mission. Scott, command module pilot, is standing in the open hatch of the Command Module (CM). Astronaut Russell L. Schweickart, lunar module pilot, took this photograph of Scott from the porch of the LM. Inside the LM was astronaut James A. McDivitt, Apollo 9 commander.

STS054-80-0N (17 Jan 1993) --- Astronaut Gregory J. Harbaugh moves along the starboard side of Endeavour's cargo bay during the four-plus hour long extravehicular activity (EVA) on January 17, 1993. The photograph was taken with a 70mm camera from inside Endeavour's cabin by a fellow crewmember. Three astronauts remained inside to support the spacewalk by astronauts Harbaugh and Mario Runco Jr. (out of frame).

41C-52-2646 (11 April 1984) --- Astronaut James D. van Hoften and a repaired satellite are in a wide panorama recorded on film with a Linhof camera, making its initial flight aboard the Space Shuttle Challenger. Dr. van Hoften is getting in his first "field" test of the Manned Maneuvering Unit (MMU) after months of training in an underwater facility and in a simulator on Earth. The Solar Maximum Mission Satellite (SMMS), revived and almost ready for release into space once more, is docked at the Flight Support System (FSS). The Remote Manipulator System (RMS) is backdropped against the blue and white Earth at frame's edge. Outside of pictures made of the Earth from astronauts on the way to the Moon, this frame showing the planet from 285 nautical miles represents the highest orbital photography in the manned space program.

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.

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.

In Discovery's cargo bay, astronaut James H. Newman works with the power ratchet tool (PRT). Astronaut Carl E. Walz, who joined Newman for the lengthy period of extravehicular activity (EVA), is partially visible in the background. The two mission specialists devoted part of their EVA to evaluating tools and equipment expected to be used in the Hubble Space Telescope servicing. A desert area in Africa forms the backdrop for the 70mm scene.

STS064-45-014 (16 Sept. 1994) --- Backdropped against a massive wall of white clouds 130 nautical miles below, astronaut Mark C. Lee floats freely as he tests the new Simplified Aid for EVA Rescue (SAFER) system. The image was exposed with a 35mm camera from the shirt-sleeve environment of the space shuttle Discovery. Astronauts Lee and Carl J. Meade took turns using the SAFER hardware during their shared Extravehicular Activity (EVA) on Sept. 16, 1994. The test of SAFER is the first phase of a larger SAFER program whose objectives are to establish a common set of requirements for both space shuttle and space station program needs, develop a flight demonstration of SAFER, validate system performance and, finally, develop a production version of SAFER for the shuttle and station programs. Photo credit: NASA or National Aeronautics and Space Administration

AS09-19-2983 (6 March 1969) --- Astronaut Russell L. Schweickart, lunar module pilot, operates a 70mm Hasselblad camera during his extravehicular activity (EVA) on the fourth day of the Apollo 9 Earth-orbital mission. The Command and Service Modules (CSM) and Lunar Module (LM) "Spider" are docked. This view was taken from the Command Module (CM) "Gumdrop". Schweickart, wearing an Extravehicular Mobility Unit (EMU), is standing in "golden slippers" on the LM porch. On his back, partially visible, are a Portable Life Support System (PLSS) and an 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.

S114-E-5933 (30 July 2005) --- Japan Aerospace Agency astronaut Soichi Noguchi, STS-114 mission specialist, and astronaut Eileen M. Collins, mission commander, share space with spacesuits and other supplies onboard Discovery during activities of Discovery's fifth flight day. Earlier on this day, astronauts Noguchi and Stephen K. Robinson, out of frame, used the NASA extravehicular mobility unit (EMU) spacesuits as they conducted a successful spacewalk.

STS-31 Mission Specialist (MS) Kathryn D. Sullivan poses for a picture before beginning extravehicular mobility unit (EMU) donning procedures in the airlock of Discovery, Orbiter Vehicle (OV) 103. Sullivan will remove the lower torso restraint and don EMU which is supported on an airlock adapter plate (AAP). When suited, Sullivan will be ready for contingency extravehicular activity (EVA) in the event that problems arise with the Hubble Space Telescope (HST) deployment. Displayed on the front of the EMU are the STS-31 mission insignia and the JSC Weightless Environment Training Facility (WETF) insignia.

STS-31 Mission Specialist (MS) Kathryn D. Sullivan, wearing extravehicular mobility unit (EMU) & communications carrier assembly (CCA), attaches service and cooling umbilical (SCU) to the EMU connection on the display & control module (DCM) during contingency extravehicular activity (EVA) preparations in the airlock of Discovery, Orbiter Vehicle (OV) 103. The procedure was completed in case an EVA was required to support Hubble Space Telescope (HST) deployment.

STS006-06-465 (7 April 1983) --- Three-fourths of the STS-6 astronaut crew appears in this unusual 35mm frame exposed in the airlock of the Earth-orbiting space shuttle Challenger. Astronaut F. Story Musgrave’s helmet visor encompasses all the action in the frame. Dr. Musgrave and astronaut Donald H. Peterson (reflected on right side of the visor) were fully suited in their Extravehicular Mobility Unit (EMU) spacesuits and were participating in EVA preparation exercises. Astronaut Karol J. Bobko, STS-6 pilot, wearing conventional onboard shuttle clothing, photographed the two during their procedures and appears at center of frame. The reversed number (1 and 2 in the mirrored image represent the EVA designations for the two mission specialists. Photo credit: NASA

S134-E-008465 (22 May 2011) --- Wearing an Extravehicular Mobility Unit spacesuit, NASA astronauts Andrew Feustel and Michael Fincke (out frame), both STS-134 mission specialists, get prepared for the mission's second spacewalk onboard the International Space Station (ISS). Once outside the orbiting complex, Feustel and Fincke 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 ISS. Photo credit: NASA

S134-E-008467 (22 May 2011) --- Wearing an Extravehicular Mobility Unit spacesuit, NASA astronauts Michael Fincke (left) and Andrew Feustel (out of frame), both STS-134 mission specialists, get prepared for the mission's second spacewalk onboard the International Space Station (ISS). Once outside the orbiting complex, Fincke and Feustel 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 ISS. Photo credit: NASA

S114-E-5591 (29 July 2005) --- Less than 24 hours away from performing a space walk, when he will be exchanging this gag hardhat for the helmet portion of an extravehicular mobility unit (EMU) space suit, astronaut Stephen K. Robinson shares some light humor with his spacewalking colleague, Japanese Aerospace Agency astronaut Soichi Noguchi, out of frame. Before the EVA is scheduled to begin, however, those two will assist in moving supplies from Raffaello. Today marks the second day of joint activities between the astronauts of Discovery and the crewmembers of the International Space Station onboard the orbital outpost.

S134-E-008462 (22 May 2011) --- A short time before they donned their Extravehicular Mobility Unit spacesuits, NASA astronauts Michael Fincke (left) and Andrew Feustel, both STS-134 mission specialists, ate breakfast snacks onboard the International Space Station (ISS). Once outside the orbiting complex, Fincke and Feustel 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 ISS. Photo credit: NASA

STS054-06-019 (17 Jan. 1993) --- Astronaut Susan J. Helms almost squeezes into the tight quarters of Endeavour's airlock to share space with her fellow mission specialists -- both attired in extravehicular mobility units (EMU) spacesuits. Astronauts Mario Runco Jr. (hands on outer edge of hatch) and Gregory J. Harbaugh spent four-plus hours on the extravehicular activity (EVA) on January 17, 1993. Helms trained with the pair for several months in preparation for the EVA. From the shirt-sleeved environment of Endeavour, she maintained communications with the two throughout the spacewalk. Also onboard NASA's newest Shuttle for the six-day mission were astronauts John H. Casper, mission commander; and Donald R. McMonagle, pilot. The photograph was taken with a 35mm camera.

STS-31 Mission Specialist (MS) Bruce McCandless II, wearing liquid cooling and ventilation garment (LCVG), works his way out of the extravehicular mobility unit (EMU) lower torso on the middeck of Discovery, Orbiter Vehicle (OV) 103. McCandless was in a standby mode to perform extravehicular activity (EVA) if needed to support Hubble Space Telescope (HST) deployment and post- deployment tasks. None was needed. His helmet and gloves freefloat in the background.

STS049-91-020 (13 May 1992) --- The successful capture of Intelsat VI satellite is recorded over Mexico on this 70mm frame, from inside the Space Shuttle Endeavour's cabin. Left to right, astronauts Richard J. Hieb, Thomas D. Akers and Pierre J. Thuot have handholds on the satellite. Ground coverage in the frame includes an area from Hermosillo, Sonara to Los Mochis in the state of Sinaloa. The nine-day mission accomplished the capture of the Intelsat, subsequent mating of the satellite to a booster and its eventual deployment, as well as a Space Station Freedom preview Extravehicular Activity (EVA). Endeavour's crew members were astronauts Daniel C. Brandenstein, mission commander; Kevin P. Chilton, pilot; and Thomas D. Akers, Richard J. Hieb, Bruce E. Melnick, Kathryn C. Thornton and Pierre J. Thuot, all mission specialists.

The Quest Airlock is in the process of being installed onto the starboard side of the Unity Node 1 of the International Space Station (ISS). Astronaut Susan J. Helms, Expedition Two flight engineer, used controls onboard the station to maneuver the Airlock into place with the Canadarm2, or Space Station Remote Manipulator System (SSRMS). The Joint Airlock is a pressurized flight element consisting of two cylindrical chambers attached end-to-end by a cornecting bulkhead and hatch. Once installed and activated, the ISS Airlock becomes the primary path for ISS space walk entry and departure for U.S. spacesuits, which are known as Extravehicular Mobility Units (EMUs). In addition, it is designed to support the Russian Orlan spacesuit for extravehicular activity (EVA). The Joint Airlock is 20-feet long, 13-feet in diameter and weighs 6.5 tons. It was built at the Marshall Space Flight Center (MSFC) by the Space Station prime contractor Boeing. The ISS Airlock has two main components: a crew airlock and an equipment airlock for storing EVA and EVA preflight preps. The Airlock was launched on July 21, 2001 aboard the Space Shuttle Orbiter Atlantis for the STS-104 mission.

These five STS-97 crew members posed for a traditional portrait during training. On the front row, left to right, are astronauts Michael J. Bloomfield, pilot; Marc Garneau, mission specialist representing the Canadian Space Agency (CSA); and Brent W. Jett, Jr., commander. In the rear, wearing training versions of the extravehicular mobility unit (EMU) space suits, (left to right) are astronauts Carlos I. Noriega, and Joseph R. Tarner, both mission specialists. The primary objective of the STS-97 mission was the delivery, assembly, and activation of the U.S. electrical power system onboard the International Space Station (ISS). The electrical power system, which is built into a 73-meter (240-foot) long solar array structure consists of solar arrays, radiators, batteries, and electronics. The entire 15.4-metric ton (17-ton) package is called the P6 Integrated Truss Segment and is the heaviest and largest element yet delivered to the station aboard a space shuttle. The electrical system will eventually provide the power necessary for the first ISS crews to live and work in the U.S. segment. The STS-97 crew of five launched aboard the Space Shuttle Orbiter Endeavor on November 30, 2000 for an 11 day mission.