In 1696, Robert Anderson, an Englishman, published a two-part treatise on how to make rocket molds, prepare propellants, and perform the calculations.

Majid Babai along with Dr. Judy Schneider, and graduate students Chris Hill and Ryan Anderson examine a cross section of the prototype rocket engine igniter created by an innovative bi-metallic 3-D printing advanced manufacturing process under a microscope.

ISS023-E-024623 (17 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, poses for a photo in the Cupola of the International Space Station while space shuttle Discovery remains docked with the station.

ISS023-E-020968 (9 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, participates in the mission's first session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Anderson and Rick Mastracchio (visible in the reflection of Anderson’s helmet visor), mission specialist, helped move 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.

ISS023-E-023876 (15 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, works in the Leonardo Multi-purpose Logistics Module (MPLM) linked to the International Space Station while space shuttle Discovery remains docked with the station.

S95-10761 (1995) --- Astronaut Michael P. Anderson, mission specialist.

ISS023-E-021562 (11 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, participates in the mission's second session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the seven-hour, 26-minute spacewalk, Anderson and Rick Mastracchio (out of frame), mission specialist, unhooked and removed the depleted ammonia tank and installed a 1,700-pound ammonia tank on the station’s Starboard 1 truss, completing the second of a three-spacewalk coolant tank replacement process.

ISS023-E-021569 (11 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, participates in the mission's second session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the seven-hour, 26-minute spacewalk, Anderson and Rick Mastracchio (out of frame), mission specialist, unhooked and removed the depleted ammonia tank and installed a 1,700-pound ammonia tank on the station’s Starboard 1 truss, completing the second of a three-spacewalk coolant tank replacement process.

ISS023-E-021561 (11 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, participates in the mission's second session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the seven-hour, 26-minute spacewalk, Anderson and Rick Mastracchio (out of frame), mission specialist, unhooked and removed the depleted ammonia tank and installed a 1,700-pound ammonia tank on the station’s Starboard 1 truss, completing the second of a three-spacewalk coolant tank replacement process.

ISS023-E-021558 (11 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, participates in the mission's second session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the seven-hour, 26-minute spacewalk, Anderson and Rick Mastracchio (out of frame), mission specialist, unhooked and removed the depleted ammonia tank and installed a 1,700-pound ammonia tank on the station’s Starboard 1 truss, completing the second of a three-spacewalk coolant tank replacement process.

S131-E-009482 (13 April 2010) --- NASA astronaut Clayton Anderson, STS-131 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 six-hour, 24-minute spacewalk, Anderson and astronaut Rick Mastracchio (out of frame), mission specialist, hooked up fluid lines of the new 1,700-pound tank, retrieved some micrometeoroid shields from the Quest airlock’s exterior, relocated a portable foot restraint and prepared cables on the Zenith 1 truss for a spare Space to Ground Ku-Band antenna, two chores required before space shuttle Atlantis' STS-132/ULF-4 mission in May.

S131-E-009486 (13 April 2010) --- NASA astronaut Clayton Anderson, STS-131 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 six-hour, 24-minute spacewalk, Anderson and astronaut Rick Mastracchio (out of frame), mission specialist, hooked up fluid lines of the new 1,700-pound tank, retrieved some micrometeoroid shields from the Quest airlock’s exterior, relocated a portable foot restraint and prepared cables on the Zenith 1 truss for a spare Space to Ground Ku-Band antenna, two chores required before space shuttle Atlantis' STS-132/ULF-4 mission in May.

S131-E-009488 (13 April 2010) --- NASA astronaut Clayton Anderson, STS-131 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 six-hour, 24-minute spacewalk, Anderson and astronaut Rick Mastracchio (out of frame), mission specialist, hooked up fluid lines of the new 1,700-pound tank, retrieved some micrometeoroid shields from the Quest airlock’s exterior, relocated a portable foot restraint and prepared cables on the Zenith 1 truss for a spare Space to Ground Ku-Band antenna, two chores required before space shuttle Atlantis' STS-132/ULF-4 mission in May.

S131-E-008741 (11 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, is pictured on the middeck of space shuttle Discovery while docked with the International Space Station.

ISS023-E-020975 (9 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, participates in the mission's first session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Anderson and astronaut Rick Mastracchio (out of frame), mission specialist, helped move 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.

ISS023-E-021164 (9 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, participates in the mission's first session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Anderson and astronaut Rick Mastracchio (out of frame), mission specialist, helped move 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.

ISS023-E-021143 (9 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, participates in the mission's first session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Anderson and astronaut Rick Mastracchio (out of frame), mission specialist, helped move 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.

ISS023-E-020966 (9 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, participates in the mission's first session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Anderson and Rick Mastracchio (out of frame), mission specialist, helped move 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.

ISS023-E-020963 (9 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, participates in the mission's first session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Anderson and Rick Mastracchio (out of frame), mission specialist, helped move 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.

JSC2009-E-240528 (5 Nov. 2009) --- Astronaut Clayton Anderson, STS-131 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Astronaut Dorothy Metcalf-Lindenburger, mission specialist, assisted Anderson.

JSC2009-E-240510 (5 Nov. 2009) --- Astronaut Clayton Anderson, STS-131 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Astronaut Dorothy Metcalf-Lindenburger, mission specialist; along with technicians assisting Anderson, are visible in the reflection in his helmet visor.

JSC2009-E-240473 (5 Nov. 2009) --- Astronaut Clayton Anderson, STS-131 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center. Astronaut Dorothy Metcalf-Lindenburger, mission specialist, assisted Anderson.

Janet Anderson, Paul Crawford, and teams at NASA’s Marshall Space Flight Center help monitor launch conditions for the Demo-2 mission from the Huntsville Operations Support Center, HOSC.

S89-E-5101 (24 Jan 1998) --- With checklist in hand on the Space Shuttle Endeavour's middeck, astronaut Michael P. Anderson, mission specialist, begins to help ready the Space Shuttle for its scheduled nine-day mission in Earth-orbit. As was the tradition with Atlantis on previous U.S/Russian joint space dockings, Endeavour carries supplies to be transferred over to the Mir Space Station complex once the two spacecraft dock later. The scene was photographed with an Electronic Still Camera at 5:46:28 GMT, January 24, 1998.

S89-E-5100 (24 Jan 1998) --- With checklist in hand on the Space Shuttle Endeavour's middeck, astronaut Michael P. Anderson, mission specialist, begins to help ready the Space Shuttle for its scheduled nine-day mission in Earth-orbit. As was the tradition with Atlantis on previous U.S/Russian joint space dockings, Endeavour carries supplies to be transferred over to the Mir Space Station complex once the two spacecraft dock later. The scene was photographed with an Electronic Still Camera at 5:45:508 GMT, January 24, 1998.

S120-E-006449 (25 Oct. 2007) --- Astronauts Doug Wheelock (left), STS-120 mission specialist, and Clay Anderson, Expedition 16 flight engineer, hold cameras in the hatch of the Quest Airlock of the International Space Station while Space Shuttle Discovery is docked with the station.

S131-E-009277 (12 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, watches a water bubble float freely between him and the camera, showing his image refracted, on the middeck of space shuttle Discovery while docked with the International Space Station.

ISS023-E-024148 (16 April 2010) --- NASA astronauts James P. Dutton Jr. (bottom), STS-131 pilot; and Clayton Anderson, mission specialist, pose for a photo in the Harmony node of the International Space Station while space shuttle Discovery remains docked with the station.

S131-E-010074 (14 April 2010) --- NASA astronauts Clayton Anderson and Dorothy Metcalf-Lindenburger, both STS-131 mission specialists, are pictured in the Kibo laboratory of the International Space Station while space shuttle Discovery remains docked with the station.

S89-E-5246 (26 Jan 1998) --- This Electronic Still Camera (ESC) image shows astronaut Michael P. Anderson, mission specialist, exercising on the modified bicycle ergometer onboard the Space Shuttle Endeavour. This ESC view was taken on January 26, 1998, at 18:31:30 MET.

S131-E-009299 (12 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, watches a water bubble float freely between him and the camera, showing his image refracted, on the middeck of space shuttle Discovery while docked with the International Space Station.

ISS016-E-009700 (4 Nov. 2007) --- Astronaut Clay Anderson, STS-120 mission specialist, prepares to eat a meal at the galley in the Zvezda Service Module of the International Space Station while Space Shuttle Discovery is docked with the station. Astronaut Peggy Whitson, Expedition 16 commander, is at right.

ISS015-E-19114 (23 July 2007) --- Astronaut Clay Anderson, Expedition 15 flight engineer, waves to the camera while participating in a session of extravehicular activity (EVA) as construction continues on the International Space Station. During the 7-hour 41-minute spacewalk, Anderson and cosmonaut Fyodor N. Yurchikhin (out of frame), commander representing Russia's Federal Space Agency, installed a television camera stanchion, reconfigured a power supply for an antenna assembly, and performed several get-ahead tasks. Also, while riding on the end of the Canadarm2, Anderson jettisoned the Early Ammonia Servicer (EAS) by shoving it opposite of the station's direction of travel.

ISS015-E-19120 (23 July 2007) --- Astronaut Clay Anderson, Expedition 15 flight engineer, waves to the camera while participating in a session of extravehicular activity (EVA) as construction continues on the International Space Station. During the 7-hour 41-minute spacewalk, Anderson and cosmonaut Fyodor N. Yurchikhin (out of frame), commander representing Russia's Federal Space Agency, installed a television camera stanchion, reconfigured a power supply for an antenna assembly, and performed several get-ahead tasks. Also, while riding on the end of the Canadarm2, Anderson jettisoned the Early Ammonia Servicer (EAS) by shoving it opposite of the station's direction of travel.

S71-21619 (1 March 1971) --- Dan Anderson works with Apollo 14 lunar samples in the Lunar Receiving Lab (LRL) during the mission?s postflight period. Photo credit: NASA

JSC2009-E-286653 (3 Nov. 2009) --- NASA astronaut Clayton C. Anderson, mission specialist

Official Portrait of Astronaut Mike Anderson (STS-107) in his orange launch and landing suit with an American flag in the background.

ISS023-E-022807 (13 April 2010) --- NASA astronaut Clayton Anderson, STS-131 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 six-hour, 24-minute spacewalk, Anderson and astronaut Rick Mastracchio (out of frame), mission specialist, hooked up fluid lines of the new 1,700-pound tank, retrieved some micrometeoroid shields from the Quest airlock’s exterior, relocated a portable foot restraint and prepared cables on the Zenith 1 truss for a spare Space to Ground Ku-Band antenna, two chores required before space shuttle Atlantis' STS-132/ULF-4 mission in May.

The Rev. Mark Anderson talks during the funeral service for former NASA astronaut Captain Bruce McCandless II, USN (Ret.), Tuesday, Jan. 16, 2018 at the United States Naval Academy Chapel in Annapolis, Maryland. Photo Credit: (NASA/Bill Ingalls)

The 2019 First Robotics Competition was held in Huntsville, Alabama on March 15 and 16 in the Von Braun Center. 55 teams from 12 states and Brazil competed in “Destination Deep Space” games. The First Robotics Competition is supported by NASA’s Marshall Space Flight Center. A team from Anderson, S.C. prepares their robot for competition.

JSC2009-E-240509 (5 Nov. 2009) --- Astronaut Clayton Anderson, STS-131 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center.

S131-E-007159 (6 April 2010) --- NASA astronaut Alan Poindexter (right), STS-131 commander; along with astronauts Clayton Anderson (center) and Rick Mastracchio, both mission specialists, are pictured on the middeck deck of space shuttle Discovery during flight day two activities.

JSC2009-E-240514 (5 Nov. 2009) --- Astronaut Clayton Anderson, STS-131 mission specialist, participates in an Extravehicular Mobility Unit (EMU) spacesuit fit check in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center.

JSC2009-E-240471 (5 Nov. 2009) --- An empty Extravehicular Mobility Unit (EMU) spacesuit is photographed prior to a fit check with astronaut Clayton Anderson (out of frame), STS-131 mission specialist, in the Space Station Airlock Test Article (SSATA) in the Crew Systems Laboratory at NASA's Johnson Space Center.

S131-E-008519 (10 April 2010) --- NASA astronauts Rick Mastracchio (left) and Clayton Anderson, both STS-131 mission specialists, work in the Quest airlock of the International Space Station while space shuttle Discovery remains docked with the station.

S117-E-06617 (9 June 2007) --- Astronaut Clayton Anderson, STS-117 mission specialist, works with stowage bags on the middeck of Space Shuttle Atlantis. After docking with the International Space Station, Anderson will join Expedition 15 in progress to serve as a flight engineer.

JSC2005-E-31315 (28 July 2005) --- Astronaut Clayton C. Anderson, Expedition 14 backup flight engineer, floats in a small life raft during an emergency bailout training session in the Neutral Buoyancy Laboratory (NBL) near the Johnson Space Center. Anderson is wearing a training version of the shuttle launch and entry suit.

S131-E-008560 (10 April 2010) --- NASA astronauts James P. Dutton Jr. (left), STS-131 pilot; Stephanie Wilson and Clayton Anderson, both mission specialists, pose for a photo in the Leonardo Multi-Purpose Logistics Module (MPLM) linked to the International Space Station while space shuttle Discovery remains docked with the station.

ISS023-E-024146 (16 April 2010) --- NASA astronauts Rick Mastracchio (top) and Clayton Anderson, both STS-131 mission specialists, pose for a photo near the Combined Operational Load Bearing External Resistance Treadmill (COLBERT) in the Harmony node of the International Space Station while space shuttle Discovery remains docked with the station.

STS089-357-003 (22-31 Jan. 1998) --- Astronaut Michael P. Anderson, STS-89 mission specialist, works on Endeavour's middeck with the Closed Equilibrated Biological Aquatic System (CEBAS), an experiment developed by the German Space Agency (DLR). The CEBAS mini-module, a middeck habitat for aquatic organisms, enables scientists to conduct various gravity-related experiments in the areas of zoology, botany and developmental biology, as well as in interdisciplinary areas such as scientific research on artificial ecosystems. Photo credit: NASA

ISS015-E-36006 (16 Oct. 2007) --- Astronaut Clay Anderson, Expedition 15 flight engineer, smiles for a photo while floating in the Unity node of the International Space Station.

ISS015-E-28715 (14 Sept. 2007) --- Astronaut Clay Anderson, Expedition 15 flight engineer, uses a communication system while checking a procedures checklist in the Zvezda Service Module of the International Space Station.

ISS015-E-18958 (23 July 2007) --- Astronaut Clay Anderson, Expedition 15 flight engineer, waves to the camera while participating in a session of extravehicular activity (EVA) as construction continues on the International Space Station. During the 7-hour 41-minute spacewalk, Anderson and cosmonaut Fyodor N. Yurchikhin (out of frame), commander representing Russia's Federal Space Agency, installed a television camera stanchion, reconfigured a power supply for an antenna assembly, and performed several get-ahead tasks. Also, while riding on the end of the Canadarm2, Anderson jettisoned the Early Ammonia Servicer (EAS) by shoving it opposite of the station's direction of travel. The station's robotic arm end effector is at left.

ISS023-E-021010 (9 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, participates in the mission's first session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Anderson and astronaut Rick Mastracchio (out of frame), mission specialist, helped move 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.

ISS023-E-021014 (9 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, participates in the mission's first session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the six-hour, 27-minute spacewalk, Anderson and astronaut Rick Mastracchio (out of frame), mission specialist, helped move 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.

S131-E-007238 (7 April 2010) --- NASA astronaut Clayton Anderson, STS-131 mission specialist, occupies the pilot?s station on the forward flight deck of space shuttle Discovery during flight day three activities.

STS089-338-008 (22-31 Jan 1998) --- Astronaut Michael P. Anderson, mission specialist, takes pictures out the aft windows on the Space Shuttle Endeavour while the Space Shuttle was docked with Russia?s Mir Space Station.

S89-E-5207 (25 Jan 1998) --- This Electronic Still Camera (ESC) image shows astronaut Michael P. Anderson, mission specialist, checking the Biotechnology Refrigerator (BTR) while transferring logistics onboard the Space Shuttle Endeavour. This ESC view was taken on January 25, 1998, at 18:56:29 GMT.

S89-E-5204 (25 Jan 1998) --- This Electronic Still Camera (ESC) image shows astronaut Michael P. Anderson, mission specialist, checking the Biotechnology Refrigerator (BTR) while transferring logistics, onboard the Space Shuttle Endeavour. This ESC view was taken on January 25, 1998, at 18:54:53 GMT.

JSC2006-E-45151 (18 Oct. 2006) --- Astronaut Clayton C. Anderson, Expedition 15 NASA space station science officer and flight engineer, dons a training version of his shuttle launch and entry suit, prior to the start of a mission training session in the Space Vehicle Mockup Facility at Johnson Space Center. United Space Alliance (USA) suit technician Joe Alvarado assisted Anderson.

S118-E-07960 (15 Aug. 2007) --- Astronaut Clay Anderson, Expedition 15 flight engineer, participates in the mission's third planned session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the 5-hour, 28-minute spacewalk, Anderson and astronaut Rick Mastracchio (out of frame), STS-118 mission specialist, relocated the S-Band Antenna Sub-Assembly from Port 6 (P6) to Port 1 (P1) truss, installed a new transponder on P1 and retrieved the P6 transponder.

NASA Astronaut Clay Anderson speaks to NASA Twitter followers during the STS-134 Tweetup, Thursday, April 28, 2011, at Kennedy Space Center in Cape Canaveral, Fla. About 150 NASA Twitter followers attended the event. Photo Credit: (NASA/Paul E. Alers)

ISS023-E-022853 (13 April 2010) --- NASA astronaut Clayton Anderson, STS-131 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 six-hour, 24-minute spacewalk, Anderson and astronaut Rick Mastracchio (out of frame), mission specialist, hooked up fluid lines of the new 1,700-pound tank, retrieved some micrometeoroid shields from the Quest airlock’s exterior, relocated a portable foot restraint and prepared cables on the Zenith 1 truss for a spare Space to Ground Ku-Band antenna, two chores required before space shuttle Atlantis' STS-132/ULF-4 mission in May.

ISS023-E-022849 (13 April 2010) --- NASA astronaut Clayton Anderson, STS-131 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 six-hour, 24-minute spacewalk, Anderson and astronaut Rick Mastracchio (out of frame), mission specialist, hooked up fluid lines of the new 1,700-pound tank, retrieved some micrometeoroid shields from the Quest airlock’s exterior, relocated a portable foot restraint and prepared cables on the Zenith 1 truss for a spare Space to Ground Ku-Band antenna, two chores required before space shuttle Atlantis' STS-132/ULF-4 mission in May.

ISS015-E-17670 (5 July 2007) --- Astronaut Clay Anderson, Expedition 15 flight engineer, works with a European Modular Cultivation System (EMCS) in the Destiny laboratory of the International Space Station.

ISS015-E-29992 (26 Sept. 2007) --- Astronaut Clay Anderson, Expedition 15 flight engineer, smiles for a photo while using a communication system in the Zvezda Service Module of the International Space Station.

ISS015-E-17654 (4 July 2007) --- NASA astronaut Clay Anderson, Expedition 15 flight engineer, poses for a photo in the Destiny laboratory of the International Space Station.

ISS015-E-31308 (27 Sept. 2007) --- Astronaut Clay Anderson, Expedition 15 flight engineer, uses a camera in the Soyuz TMA-10 spacecraft docked to the Zarya module nadir port of the International Space Station.

ISS015-E-31714 (3 Oct. 2007) --- NASA astronaut Clay Anderson, Expedition 15 flight engineer, poses with a microbial air sampler (MAS) and petri dish in the Destiny laboratory of the International Space Station.

ISS015-E-19537 (19 July 2007) --- Astronaut Clay Anderson, Expedition 15 flight engineer, poses for a photo with two extravehicular mobility units (EMU) in the Quest Airlock of the International Space Station

STS107-E-05033 (18 January 2003) --- Astronaut Michael P. Anderson, STS-107 payload commander, is pictured on the aft flight deck of the Earth-orbiting Space Shuttle Columbia.

ISS015-E-20221 (28 July 2007) --- Astronaut Clay Anderson, Expedition 15 flight engineer, poses for a photo as he floats in the Destiny laboratory of the International Space Station.

ISS015-E-31717 (3 Oct. 2007) --- Astronaut Clay Anderson, Expedition 15 flight engineer, poses with a microbial air sampler (MAS) and petri dish in the Destiny laboratory of the International Space Station.

ISS015-E-15665 (2 July 2007) --- Astronaut Clayton C. Anderson, Expedition 15 flight engineer, works with an Extravehicular Mobility Unit (EMU) spacesuit in the Quest Airlock of the International Space Station.

ISS015-E-15662 (2 July 2007) --- Astronaut Clayton C. Anderson, Expedition 15 flight engineer, works with an Extravehicular Mobility Unit (EMU) spacesuit in the Quest Airlock of the International Space Station.

ISS015-E-15680 (2 July 2007) --- Astronaut Clayton C. Anderson, Expedition 15 flight engineer, poses for a photo with an Extravehicular Mobility Unit (EMU) spacesuit in the Quest Airlock of the International Space Station.

ISS015-E-19264 (24 July 2007) --- Astronaut Clay Anderson, Expedition 15 flight engineer, wearing communication headgear, smiles for the camera as he floats in the Zvezda Service Module of the International Space Station.

ISS015-E-18872 (21 July 2007) --- Astronaut Clay Anderson, Expedition 15 flight engineer, poses for a photo with food packets floating freely in the Zvezda Service Module of the International Space Station.

ISS015-E-29047 (15 Sept. 2007) --- NASA astronaut Clay Anderson, Expedition 15 flight engineer, smiles for a photo while floating in the Unity node of the International Space Station.

ISS015-E-20239 (28 July 2007) --- Astronaut Clay Anderson, Expedition 15 flight engineer, poses for a photo as he floats in the Destiny laboratory of the International Space Station.

ISS015-E-27279 (3 Sept. 2007) --- NASA astronaut Clay Anderson, Expedition 15 flight engineer, poses for a photo near the Earth observation window in the Destiny laboratory of the International Space Station.

ISS015-E-19626 (28 July 2007) --- Astronaut Clay Anderson, Expedition 15 flight engineer, poses for a photo as he floats in the Destiny laboratory of the International Space Station.

ISS016-E-009301 (4 Nov. 2007) --- Astronaut Clay Anderson, STS-120 mission specialist, uses a computer in the Destiny laboratory of the International Space Station while Space Shuttle Discovery is docked with the station.

ISS015-E-14705 (28 June 2007) --- Astronaut Clayton C. Anderson, Expedition 15 flight engineer, works with the Microgravity Science Glovebox (MSG) in the Destiny laboratory of the International Space Station.

ISS023-E-021506 (11 April 2010) --- NASA astronaut Rick Mastracchio, STS-131 mission specialist, participates in the mission's second session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the seven-hour, 26-minute spacewalk, Mastracchio and astronaut Clayton Anderson (out of frame), mission specialist, unhooked and removed the depleted ammonia tank and installed a 1,700-pound ammonia tank on the station’s Starboard 1 truss, completing the second of a three-spacewalk coolant tank replacement process.

ISS023-E-021515 (11 April 2010) --- NASA astronaut Rick Mastracchio, STS-131 mission specialist, participates in the mission's second session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the seven-hour, 26-minute spacewalk, Mastracchio and astronaut Clayton Anderson (out of frame), mission specialist, unhooked and removed the depleted ammonia tank and installed a 1,700-pound ammonia tank on the station’s Starboard 1 truss, completing the second of a three-spacewalk coolant tank replacement process.

ISS023-E-021503 (11 April 2010) --- NASA astronaut Rick Mastracchio, STS-131 mission specialist, participates in the mission's second session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the seven-hour, 26-minute spacewalk, Mastracchio and astronaut Clayton Anderson (out of frame), mission specialist, unhooked and removed the depleted ammonia tank and installed a 1,700-pound ammonia tank on the station’s Starboard 1 truss, completing the second of a three-spacewalk coolant tank replacement process.

ISS023-E-021510 (11 April 2010) --- NASA astronaut Rick Mastracchio, STS-131 mission specialist, participates in the mission's second session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the seven-hour, 26-minute spacewalk, Mastracchio and astronaut Clayton Anderson (out of frame), mission specialist, unhooked and removed the depleted ammonia tank and installed a 1,700-pound ammonia tank on the station’s Starboard 1 truss, completing the second of a three-spacewalk coolant tank replacement process.

ISS023-E-021535 (11 April 2010) --- NASA astronaut Rick Mastracchio, STS-131 mission specialist, participates in the mission's second session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the seven-hour, 26-minute spacewalk, Mastracchio and astronaut Clayton Anderson (out of frame), mission specialist, unhooked and removed the depleted ammonia tank and installed a 1,700-pound ammonia tank on the station’s Starboard 1 truss, completing the second of a three-spacewalk coolant tank replacement process.

ISS023-E-021525 (11 April 2010) --- NASA astronaut Rick Mastracchio, STS-131 mission specialist, participates in the mission's second session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the seven-hour, 26-minute spacewalk, Mastracchio and astronaut Clayton Anderson (out of frame), mission specialist, unhooked and removed the depleted ammonia tank and installed a 1,700-pound ammonia tank on the station’s Starboard 1 truss, completing the second of a three-spacewalk coolant tank replacement process.

ISS023-E-021537 (11 April 2010) --- NASA astronaut Rick Mastracchio, STS-131 mission specialist, participates in the mission's second session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the seven-hour, 26-minute spacewalk, Mastracchio and astronaut Clayton Anderson (out of frame), mission specialist, unhooked and removed the depleted ammonia tank and installed a 1,700-pound ammonia tank on the station’s Starboard 1 truss, completing the second of a three-spacewalk coolant tank replacement process.

ISS023-E-021529 (11 April 2010) --- NASA astronaut Rick Mastracchio, STS-131 mission specialist, participates in the mission's second session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the seven-hour, 26-minute spacewalk, Mastracchio and astronaut Clayton Anderson (out of frame), mission specialist, unhooked and removed the depleted ammonia tank and installed a 1,700-pound ammonia tank on the station’s Starboard 1 truss, completing the second of a three-spacewalk coolant tank replacement process.

S118-E-07970 (15 Aug. 2007) --- Astronaut Clay Anderson, Expedition 15 flight engineer, participates in the mission's third planned session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the 5-hour, 28-minute spacewalk, Anderson and astronaut Rick Mastracchio (out of frame), STS-118 mission specialist, relocated the S-Band Antenna Sub-Assembly from Port 6 (P6) to Port 1 (P1) truss, installed a new transponder on P1 and retrieved the P6 transponder. The blackness of space and Earth's horizon provide the backdrop for the scene.

S118-E-07966 (15 Aug. 2007) --- Astronaut Clay Anderson, Expedition 15 flight engineer, participates in the mission's third planned session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the 5-hour, 28-minute spacewalk, Anderson and astronaut Rick Mastracchio (out of frame), STS-118 mission specialist, relocated the S-Band Antenna Sub-Assembly from Port 6 (P6) to Port 1 (P1) truss, installed a new transponder on P1 and retrieved the P6 transponder. The blackness of space and Earth's horizon provide the backdrop for the scene.

ISS015-E-19135 (23 July 2007) --- Anchored to the Canadarm2 foot restraint, astronaut Clay Anderson, Expedition 15 flight engineer, removes the Early Ammonia Servicer (EAS) from its place on the International Space Station during a session of extravehicular activity (EVA). Anderson later jettisoned the EAS by shoving it opposite of the station's direction of travel. The EAS was installed on the P6 truss during STS-105 in August 2001, as an ammonia reservoir if a leak had occurred. It was never used, and was no longer needed after the permanent cooling system was activated last December. The blackness of space and Earth's horizon provide the backdrop for the scene.

S118-E-09144 (18 Aug. 2007) --- Astronauts Clay Anderson, Expedition 15 flight engineer, and Dave Williams (out of frame), STS-118 mission specialist representing the Canadian Space Agency, participate in the mission's fourth and final session of extravehicular activity (EVA) as construction and maintenance continue on the International Space Station. During the 5-hour spacewalk, Anderson and Williams installed the External Wireless Instrumentation System antenna, attached a stand for the shuttle's robotic arm extension boom and retrieved the two Materials International Space Station Experiments (MISSE) to be brought back on the shuttle.

ISS015-E-19140 (23 July 2007) --- Anchored to the Canadarm2 foot restraint, astronaut Clay Anderson, Expedition 15 flight engineer, removes the Early Ammonia Servicer (EAS) from its place on the International Space Station during a session of extravehicular activity (EVA). Anderson later jettisoned the EAS by shoving it opposite of the station's direction of travel. The EAS was installed on the P6 truss during STS-105 in August 2001, as an ammonia reservoir if a leak had occurred. It was never used, and was no longer needed after the permanent cooling system was activated last December. The blackness of space and Earth's horizon provide the backdrop for the scene.

ISS015-E-19179 (23 July 2007) --- Astronaut Clay Anderson, Expedition 15 flight engineer, enters the Quest Airlock on the International Space Station at the conclusion of today's session of extravehicular activity (EVA). During the 7-hour 41-minute spacewalk, Anderson and cosmonaut Fyodor N. Yurchikhin (out of frame), commander representing Russia's Federal Space Agency, installed a television camera stanchion, reconfigured a power supply for an antenna assembly, and performed several get-ahead tasks. Also, while riding on the end of the Canadarm2, Anderson jettisoned the Early Ammonia Servicer (EAS) by shoving it opposite of the station's direction of travel.

ISS015-E-19165 (23 July 2007) --- Astronaut Clay Anderson, Expedition 15 flight engineer, enters the Quest Airlock on the International Space Station at the conclusion of today's session of extravehicular activity (EVA). During the 7-hour 41-minute spacewalk, Anderson and cosmonaut Fyodor N. Yurchikhin (out of frame), commander representing Russia's Federal Space Agency, installed a television camera stanchion, reconfigured a power supply for an antenna assembly, and performed several get-ahead tasks. Also, while riding on the end of the Canadarm2, Anderson jettisoned the Early Ammonia Servicer (EAS) by shoving it opposite of the station's direction of travel.

ISS015-E-13648 (25 June 2007) --- Astronaut Clayton Anderson, Expedition 15 flight engineer, works with test samples in the Human Research Facility 2 (HRF-2) Refrigerated Centrifuge as a part of the Nutritional Status Assessment (Nutrition) experiment in the Destiny laboratory of the International Space Station. The results of the Nutrition experiment will be used to better understand the time course effects of space flight on human physiology.