
ESA astronaut Paolo Nespoli speaks to Marines about his time onboard the International Space Station after a tour of the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

ESA astronaut Paolo Nespoli tours the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

ESA astronaut Paolo Nespoli tours the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

ESA astronaut Paolo Nespoli tours the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik, center, wife Rebecca, right, and ESA astronaut Paolo Nespoli tour the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik, left, and ESA astronaut Paolo Nespoli, right, pose for a photo outside the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

ESA astronaut Paolo Nespoli sits on a couch where Archibald Henderson, the 5th Commandant of the Marine Corps passed away in 1859, during a tour of the Home of the Commandants, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik, right, and ESA astronaut Paolo Nespoli, left, speak to Marines about their time onboard the International Space Station after touring the Home of the Commandants of the Marine Corps, Monday, May 7, 2018 in Washington. Photo Credit: (NASA/Aubrey Gemignani)

JSC2010-E-045317 (12 Jan. 2010) --- European Space Agency (ESA) astronaut Paolo Nespoli, ISS flight engineer. Photo credit: NASA or National Aeronautics and Space Administration

JSC2007-E-34565 (18 April 2007) --- Astronaut Paolo A. Nespoli, mission specialist representing the European Space Agency (ESA)

JSC2007-E-34562 (18 April 2007) --- Astronaut Paolo A. Nespoli, mission specialist representing the European Space Agency (ESA)

JSC2007-E-34563 (18 April 2007) --- Astronaut Paolo A. Nespoli, mission specialist representing the European Space Agency (ESA)

JSC2007-E-34564 (18 April 2007) --- Astronaut Paolo A. Nespoli, mission specialist representing the European Space Agency (ESA)

S99-08629 (Jan 1999) --- Astronaut Paolo A. Nespoli, mission specialist, representing European Space Agency (ESA).

iss053e020149 (Sept. 14, 2017) --- Flight Engineer Paolo Nespoli sets up thermal exchange hardware inside the Microgravity Science Glovebox located in the U.S. Destiny laboratory module.

Expedition 27 Flight Engineer Paolo Nespoli smiles shortly after he and Commander Dmitry Kondratyev and Flight Engineer Cady Coleman landed in their Soyuz TMA-20 southeast of the town of Zhezkazgan, Kazakhstan, on Tuesday, May 24, 2011. NASA Astronaut Coleman, Russian Cosmonaut Kondratyev and Italian Astronaut Nespoli are returning from more than five months onboard the International Space Station where they served as members of the Expedition 26 and 27 crews. Photo Credit: (NASA/Bill Ingalls)

Italian European Space Agency Astronaut Paolo Nespoli makes comments about the STS-125 mission to the Hubble Space Telescope during a visit by the crew to the Embassy of Italy in Washington, Thursday, July 23, 2009. Nespoli was assigned to the crew of STS-120, an International Space Station (ISS) assembly mission. Photo Credit: (NASA/Bill Ingalls)

Expedition 27 Flight Engineer Paolo Nespoli gives a thumbs up as he is carried in a chair to the medical tent shortly after he and Commander Dmitry Kondratyev and Flight Engineer Cady Coleman landed in their Soyuz TMA-20 southeast of the town of Zhezkazgan, Kazakhstan, on Tuesday, May 24, 2011. NASA Astronaut Coleman, Russian Cosmonaut Kondratyev and Italian Astronaut Nespoli are returning from more than five months onboard the International Space Station where they served as members of the Expedition 26 and 27 crews. Photo Credit: (NASA/Bill Ingalls)

Expedition 26 crew members Cady Coleman and Paolo Nespoli during ISS EVA PRF 41027 training in the NBL. Photo Date: September 21, 2010. Location: NBL - Pool Topside. Photographer: Robert Markowitz.

Expedition 26 crew members Cady Coleman and Paolo Nespoli during ISS EVA PRF 41027 training in the NBL. Photo Date: September 21, 2010. Location: NBL - Pool Topside. Photographer: Robert Markowitz.

Expedition 26 crew members Cady Coleman and Paolo Nespoli during ISS EVA PRF 41027 training in the NBL. Photo Date: September 21, 2010. Location: NBL - Pool Topside. Photographer: Robert Markowitz.

PHOTO DATE: 4/5/10, Time: 1000 LOCATION: Bldg 7/SSATA Chamber SUBJECT: STB-ST-903 - INC 26 SSATA Crew Training: Paolo Nespoli Photographer: James Blair

PHOTO DATE: 10-14-10 LOCATION: Bldg T-585, rm 118 SUBJECT: Expedition 26 crew members Cady Coleman and Paolo Nespoli during camera review training6 PHOTOGRAPHER: James Blair

PHOTO DATE: 4/5/10, Time: 1000 LOCATION: Bldg 7/SSATA Chamber SUBJECT: STB-ST-903 - INC 26 SSATA Crew Training: Paolo Nespoli Photographer: James Blair

Expedition 26 crew members Cady Coleman and Paolo Nespoli during ISS EVA PRF 41027 training in the NBL. Photo Date: September 21, 2010. Location: NBL - Pool Topside. Photographer: Robert Markowitz.

Expedition 26 crew members Cady Coleman and Paolo Nespoli during ISS EVA PRF 41027 training in the NBL. Photo Date: September 21, 2010. Location: NBL - Pool Topside. Photographer: Robert Markowitz.

PHOTO DATE: 4/5/10, Time: 1000 LOCATION: Bldg 7/SSATA Chamber SUBJECT: STB-ST-903 - INC 26 SSATA Crew Training: Paolo Nespoli Photographer: James Blair

PHOTO DATE: 4/5/10, Time: 1000 LOCATION: Bldg 7/SSATA Chamber SUBJECT: STB-ST-903 - INC 26 SSATA Crew Training: Paolo Nespoli Photographer: James Blair

Expedition 26 crew members Cady Coleman and Paolo Nespoli during ISS EVA PRF 41027 training in the NBL. Photo Date: September 21, 2010. Location: NBL - Pool Topside. Photographer: Robert Markowitz.

Expedition 26 crew members Cady Coleman and Paolo Nespoli during ISS EVA PRF 41027 training in the NBL. Photo Date: September 21, 2010. Location: NBL - Pool Topside. Photographer: Robert Markowitz.

PHOTO DATE: 10-14-10 LOCATION: Bldg T-585, rm 118 SUBJECT: Expedition 26 crew members Cady Coleman and Paolo Nespoli during camera review training6 PHOTOGRAPHER: James Blair

PHOTO DATE: 10-14-10 LOCATION: Bldg T-585, rm 118 SUBJECT: Expedition 26 crew members Cady Coleman and Paolo Nespoli during camera review training6 PHOTOGRAPHER: James Blair

iss052e024957 (Aug. 1, 2017) --- Astronaut Paolo Nespoli ingressed the Muscle Atrophy Research & Exercise System (MARES) chair in the Columbus module and adjusted pads and constraints for the Sarcolab-3 ankle protocol. The data collected for Sarcolab-3 will be compared to pre and postflight measurements to assess the impact of hypothesized microgravity induced muscle loss.

STS-120 Mission Specialists Scott Parazynski (left) and Paolo Nespoli talk before their return to flight to Houston. A welcoming ceremony for the crew is planned at NASA's Hangar 276 on the south end of Ellington Field in Texas. On the 15-day mission, the STS-120 crew continued the construction of the station with the installation of the Harmony Node 2 module and the relocation of the P6 truss. They landed Nov. 7 at NASA's Kennedy Space Center.

ESA (European Space Agency) astronaut Paolo Nespoli rests in a chair shortly after he and NASA astronaut Randy Bresnik, and Roscosmos cosmonaut Sergey Ryazanskiy landed in their Soyuz MS-05 spacecraft in a remote area near the town of Zhezkazgan, Kazakhstan on Thursday, Dec. 14, 2017. Bresnik, Nespoli and Ryazanskiy are returning after 139 days in space where they served as members of the Expedition 52 and 53 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

ESA (European Space Agency) astronaut Paolo Nespoli, center, arrives at the Karaganda Airport in Kazakhstan airport after he, NASA astronaut Randy Bresnik and, Roscosmos cosmonaut Sergey Ryazanskiy landed in their Soyuz MS-05 spacecraft in a remote area near the town of Zhezkazgan, Kazakhstan on Thursday, Dec. 14, 2017. Bresnik, Nespoli and Ryazanskiy are returning after 139 days in space where they served as members of the Expedition 52 and 53 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

ESA (European Space Agency) astronaut Paolo Nespoli is carried to the medical tent shortly after he and NASA astronaut Randy Bresnik, and Roscosmos cosmonaut Sergey Ryazanskiy landed in their Soyuz MS-05 spacecraft in a remote area near the town of Zhezkazgan, Kazakhstan on Thursday, Dec. 14, 2017. Bresnik, Nespoli and Ryazanskiy are returning after 139 days in space where they served as members of the Expedition 52 and 53 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Expedition 52 flight engineer Paolo Nespoli of ESA lays roses at the site where Russian space icons are interred as part of traditional pre-launch ceremonies, Monday, July 10, 2017 in Moscow. Photo Credit: (NASA/Bill Ingalls)

Paolo Nespoli, Italian astronaut and Expedition 26 Flight Engineer, is seen at the State Commission meeting held at the Cosmonaut Hotel in Baikonur, Kazakhstan on Tuesday, Dec. 14, 2010. Photo Credit: (NASA/Carla Cioffi)

Expedition 26 Flight Engineer and Italian astronaut Paolo Nespoli speaks at the State Commission press conference held at the Cosmonaut Hotel in Baikonur, Kazakhstan on Tuesday, Dec. 14, 2010. Photo Credit: (NASA/Carla Cioffi)

Expedition 26 Flight Engineer and Italian astronaut Paolo Nespoli is seen at the State Commission press conference held at the Cosmonaut Hotel in Baikonur, Kazakhstan on Tuesday, Dec. 14, 2010. Photo Credit: (NASA/Carla Cioffi)

iss052e075356 (8/25/2017) --- European Space Agency (ESA) astronaut Paolo Nespoli is photographed performing protocol operation for ESA’s SUPVIS-Justin investigation. SUPVIS-Justin, part of the Meteron program, aims to demonstrate that an astronaut on an orbiting space station can command a robot via a tablet PC to perform complex tasks on a planetary surface. The SUPVIS Justin experiment includes an extended supervised autonomy concept: the crew gives high level commands to the robot, which then uses its local intelligence and decision-making capability to execute a task independently, according to pre-programmed algorithms. In this sense, the responsibility of decision-making is shared between the crew and the robot. External Caption

ISS027-E-008748 (28 March 2011) --- Backdropped by Earth?s horizon and the blackness of space, the International Space Station's Canadarm2 unberths the unpiloted Japan Aerospace Exploration Agency?s Kounotori2 H-II Transfer Vehicle (HTV2), filled with trash and unneeded items, in preparation for its release from the station. NASA astronaut Cady Coleman and European Space Agency astronaut Paolo Nespoli, both Expedition 27 flight engineers, used the station?s robot arm to grapple the HTV2 and unberth it from the Earth-facing port of the Harmony node. The cargo craft was released at 11:46 a.m. (EDT) on March 28, 2011.

Expedition 26 European Space Agency astronaut Paolo Nespoli has his Russian Sokol suit pressure checked at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Wednesday, Dec. 15, 2010. Nespoli and fellow Expedition 26 crew members Soyuz Commander Dmitry Kondratryev and NASA Flight Engineer Catherine Coleman launched in their Soyuz TMA-20 rocket from the Baikonur Cosmodrome in Kazakhstan the following morning at 1:09 a.m. local time. (Photo Credit: NASA/Carla Cioffi)

ESA (European Space Agency) astronaut Paolo Nespoli is helped out of the Soyuz MS-05 spacecraft just minutes after he, NASA astronaut Randy Bresnik, and Roscosmos cosmonaut Sergey Ryazanskiy, landed in a remote area near the town of Zhezkazgan, Kazakhstan on Thursday, Dec. 14, 2017. Bresnik, Nespoli and Ryazanskiy are returning after 139 days in space where they served as members of the Expedition 52 and 53 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

NASA astronaut Randy Bresnik, left, Roscosmos cosmonaut Sergey Ryazanskiy, center, and ESA (European Space Agency) astronaut Paolo Nespoli sit in chairs outside the Soyuz MS-05 spacecraft a few moments after they landed in a remote area near the town of Zhezkazgan, Kazakhstan on Thursday, Dec. 14, 2017. Bresnik, Nespoli and Ryazanskiy are returning after 139 days in space where they served as members of the Expedition 52 and 53 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

ESA astronaut Paolo Nespoli speaks about his time onboard the International Space Station during expeditions 52/53, Thursday, May 10, 2018 at the Smithsonian National Air and Space Museum in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik, left, and ESA astronaut Paolo Nespoli speak about their time onboard the International Space Station during expeditions 52/53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik, right, and ESA astronaut Paolo Nespoli, left, speak about their time onboard the International Space Station during expeditions 52/53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik, left, and ESA astronaut Paolo Nespoli answer questions about their time onboard the International Space Station during expeditions 52/53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik, left, and ESA astronaut Paolo Nespoli speak about their time onboard the International Space Station during expeditions 52/53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

ESA astronaut Paolo Nespoli speaks to an audience member during a break about his time onboard the International Space Station, Thursday, May 10, 2018 at the Smithsonian National Air and Space Museum in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik, left, and ESA astronaut Paolo Nespoli answer questions about their time onboard the International Space Station during expeditions 52/53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

ESA astronaut Paolo Nespoli gives a patch to a teacher for Teacher Appreciation Week after speaking about his time onboard the International Space Station during expeditions 52/53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

ESA astronaut Paolo Nespoli speaks about his time onboard the International Space Station during expeditions 52/53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik, left, and ESA astronaut Paolo Nespoli answer questions about their time onboard the International Space Station during expeditions 52/53, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

ESA (European Space Agency) astronaut Paolo Nespoli is seen during a Karaganda Airport welcome ceremony in Kazakhstan on Thursday, Dec. 14, 2017. 2017. Ryazanskiy, Roscosmos cosmonaut Sergey Ryazanskiy and NASA astronaut Randy Bresnik are returning after 139 days in space where they served as members of the Expedition 52 and 53 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

ESA (European Space Agency) astronaut Paolo Nespoli answers a question during a Karaganda Airport welcome ceremony in Kazakhstan on Thursday, Dec. 14, 2017. 2017. Ryazanskiy, Roscosmos cosmonaut Sergey Ryazanskiy and NASA astronaut Randy Bresnik are returning after 139 days in space where they served as members of the Expedition 52 and 53 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

NASA Administrator Jim Bridenstine, center, meets with ESA astronaut Paolo Nespoli, left, and NASA astronaut Randy Bresnik, Wednesday, May 9, 2018 at NASA Headquarters in Washington. Photo Credit: (NASA/Bill Ingalls)

NASA Administrator Jim Bridenstine, left, makes a photograph with NASA astronaut Randy Bresnik, center, and ESA astronaut Paolo Nespoli, Wednesday, May 9, 2018 at NASA Headquarters in Washington. Photo Credit: (NASA/Bill Ingalls)

NASA astronaut Randy Bresnik and ESA astronaut Paolo Nespoli speak about their time onboard the International Space Station, Friday, May 11, 2018 at the Washington School for Girls in Washington. Photo Credit: (NASA/Aubrey Gemignani)

iss053e323106 (12/10/2017) --- European Space Agency (ESA) astronaut Paolo Nespoli in the Columbus module with AstroPi hardware. AstroPi uses two augmented Raspberry Pi computers equipped with the mighty Sense HAT (Hardware Attached on Top) that measures the environment inside the space station, detect how the station moves through space, and pick up the Earth’s magnetic field. Each AstroPi is also equipped with different kinds of cameras: one has an infrared camera, and the other has a standard visible spectrum camera. The activities related to this project are intended to encourage and strengthen the teaching of computing and coding curriculums, and through this stimulate the curiosity of students and motivate them towards further study of STEM (Science, Technology, Engineering and Mathematics) subjects.

Expedition 26 European Space Agency astronaut and Flight Engineer Paolo Nespoli performs the traditional door signing Wednesday, Dec. 15, 2010 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Nespoli was launched onboard the Soyuz rocket the following morning with Expedition 26 Soyuz Commander Dmitry Kondratyev and NASA Flight Engineer Catherine Coleman on a mission to the International Space Station (ISS). Photo Credit: (NASA/Carla Cioffi)

Expedition 26 European Space Agency astronaut Paolo Nespoli has his Russian Sokol suit pressure checked, while his crew mates NASA Flight Engineer Catherine Colemen and Soyuz Commander Dmitry Kondtratyev, far right, look on at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Wednesday, Dec. 15, 2010. Nespoli, Kondratryev and Coleman launched in their Soyuz TMA-20 rocket from the Baikonur Cosmodrome in Kazakhstan the following morning at 1:09 a.m. local time. (Photo Credit: NASA/Carla Cioffi)

Expedition 26 European Space Agency astronaut Paolo Nespoli has his Russian Sokol suit pressure checked at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Wednesday, Dec. 15, 2010. Nespoli and fellow Expedition 26 crew members Soyuz Commander Dmitry Kondratryev and NASA Flight Engineer Catherine Coleman launched in their Soyuz TMA-20 rocket from the Baikonur Cosmodrome in Kazakhstan the following morning at 1:09 a.m. local time. (Photo Credit: NASA/Carla Cioffi)

Expedition 26 European Space Agency astronaut Paolo Nespoli has his Russian Sokol suit pressure checked at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Wednesday, Dec. 15, 2010. Nespoli and fellow Expedition 26 crew members Soyuz Commander Dmitry Kondratryev and NASA Flight Engineer Catherine Coleman launched in their Soyuz TMA-20 rocket from the Baikonur Cosmodrome in Kazakhstan the following morning at 1:09 a.m. local time. (Photo Credit: NASA/Carla Cioffi)

ESA (European Space Agency) astronaut Paolo Nespoli, left, Roscosmos cosmonaut Sergey Ryazanskiy, center, and NASA astronaut Randy Bresnik are seen during a Karaganda Airport welcome ceremony in Kazakhstan on Thursday, Dec. 14, 2017. 2017. Nespoli, Bresnik, and Ryazanskiy are returning after 139 days in space where they served as members of the Expedition 52 and 53 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Expedition 26 Soyuz Flight Engineer Catherine Coleman, left, and European Space Agency astronaut Paolo Nespoli share a few words during their Russian Sokol suit pressure check at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Wednesday, Dec. 15, 2010. Coleman, Nespolie and Expedition Soyuz Commander Dmitry Kondratyev launched in their Soyuz TMA-20 rocket from the Baikonur Cosmodrome in Kazakhstan the following morning at 1:09 a.m. local time. (Photo Credit: NASA/Carla Cioffi)

Expedition 26 European Space Agency astronaut Paolo Nespoli has his Russian Sokol suit pressure checked at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Wednesday, Dec. 15, 2010. Nespoli and fellow Expedition 26 crew members Soyuz Commander Dmitry Kondratryev and NASA Flight Engineer Catherine Coleman launched in their Soyuz TMA-20 rocket from the Baikonur Cosmodrome in Kazakhstan the following morning at 1:09 a.m. local time. (Photo Credit: NASA/Carla Cioffi)

NASA astronaut Randy Bresnik, left, and ESA astronaut Paolo Nespoli, right, speak about their time onboard the International Space Station during expeditions 52/53, Thursday, May 10, 2018 at the Smithsonian National Air and Space Museum in Washington. Photo Credit: (NASA/Aubrey Gemignani)

Expedition 52 flight engineer Paolo Nespoli of ESA is seen during a crew press conference at the Gagarin Cosmonaut Training Center (GCTC), Monday, July 10, 2017 in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 24 back-up European Space Agency crew member Paolo Nespoli of Italy, far left, helps Doug Wheelock and Soyuz Commander Fyodor Yurchikhin with their Russian Sokol suit preparations at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Tuesday, June 15, 2010. Photo Credit: (NASA/Carla Cioffi)

Expedition 24 back-up European Space Agency crew member Paolo Nespoli of Italy helps Doug Wheelock with his Russian Sokol suit preparations at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Tuesday, June 15, 2010. Photo Credit: (NASA/Carla Cioffi)

Expedition 52 flight engineer Paolo Nespoli of ESA answers a reporter's question during a crew press conference at the Gagarin Cosmonaut Training Center (GCTC), Monday, July 10, 2017 in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

NASA Administrator Jim Bridenstine meets with NASA astronaut Randy Bresnik, right, Bresnik's wife Rebecca and ESA astronaut Paolo Nespoli, Wednesday, May 9, 2018 at NASA Headquarters in Washington. Photo Credit: (NASA/Bill Ingalls)

Expedition 26 Flight Engineer Paolo Nespoli, right, speaks as Expedition 26 Soyuz Commander Dmitry Kondratyev, looks on at the State Commission press conference held at the Cosmonaut Hotel in Baikonur, Kazakhstan on Tuesday, Dec. 14, 2010. Photo Credit: (NASA/Carla Cioffi)

NASA astronaut Randy Bresnik, left, and ESA astronaut Paolo Nespoli, right, speak about their time onboard the International Space Station during expeditions 52/53, Thursday, May 10, 2018 at the Smithsonian National Air and Space Museum in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA astronaut Randy Bresnik, second from right, and ESA astronaut Paolo Nespoli, right, speak about their time onboard the International Space Station during expeditions 52/53, Thursday, May 10, 2018 at the Smithsonian National Air and Space Museum in Washington. Photo Credit: (NASA/Aubrey Gemignani)

Expedition 52 flight engineer Paolo Nespoli of ESA is seen during a crew press conference at the Gagarin Cosmonaut Training Center (GCTC), Monday, July 10, 2017 in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

NASA astronaut Randy Bresnik, right, and ESA astronaut Paolo Nespoli, left, speak about their time onboard the International Space Station during expeditions 52/53, Thursday, May 10, 2018 at the Smithsonian National Air and Space Museum in Washington. Photo Credit: (NASA/Aubrey Gemignani)

NASA Administrator Jim Bridenstine, left, meets with NASA astronaut Randy Bresnik, Bresnik's wife Rebecca, and ESA astronaut Paolo Nespoli, right, Wednesday, May 9, 2018 at NASA Headquarters in Washington. Photo Credit: (NASA/Bill Ingalls)

Expedition 26 Flight Engineer Catherine Coleman, left, Expedition 26 Soyuz Commander Dmitry Kondratyev and Flight Engineer Paolo Nespoli, right, join hands following the State Commission press conference held at the Cosmonaut Hotel in Baikonur, Kazakhstan on Tuesday, Dec. 14, 2010. Photo Credit: (NASA/Carla Cioffi)

NASA astronaut Randy Bresnik, left, and ESA astronaut Paolo Nespoli, right, speak about their time onboard the International Space Station during expeditions 52/53, Thursday, May 10, 2018 at the Smithsonian National Air and Space Museum in Washington. Photo Credit: (NASA/Aubrey Gemignani)

Expedition 26 Flight Engineer Paolo Nespoli, right, speaks at the State Commission press conference held at the Cosmonaut Hotel in Baikonur, Kazakhstan on Tuesday, Dec. 14, 2010, as Soyuz Commander Dmitry Kondratyev and Expedition 26 Flight Engineer Catherine Coleman look on. Photo Credit: (NASA/Carla Cioffi)

NASA astronaut Randy Bresnik, left, and ESA astronaut Paolo Nespoli, right, speak about their time onboard the International Space Station during expeditions 52/53, Thursday, May 10, 2018 at the Smithsonian National Air and Space Museum in Washington. Photo Credit: (NASA/Aubrey Gemignani)

Expedition 52 flight engineer Paolo Nespoli of ESA answers a reporter's question during a crew press conference at the Gagarin Cosmonaut Training Center (GCTC), Monday, July 10, 2017 in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 50 backup crew members, NASA astronaut Jack Fisher, left, Russian cosmonaut Fyodor Yurchikhin of Roscosmos, center, and ESA astronaut Paolo Nespoli, left, answer questions from the press ahead of their Soyuz qualification exams, Monday, Oct. 24, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

nhq2017070600121 (July 6, 2017) --- Expedition 52 flight engineer Paolo Nespoli of ESA participates in qualification exams with Expedition 52 flight engineers Randy Bresnik of NASA, and Alexander Misurkin of Roscosmos, Wednesday, July 5, 2017 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Beth Weissinger)

Expedition 50 backup crew members, ESA astronaut Paolo Nespoli, left, Russian Russian cosmonaut Fyodor Yurchikhin of Roscosmos, center, and NASA astronaut Jack Fisher meet with mission managers during their Soyuz qualification exams, Monday, Oct. 24, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 50 backup crew members, NASA astronaut Jack Fisher, left, Russian cosmonaut Fyodor Yurchikhin of Roscosmos, center, and ESA astronaut Paolo Nespoli, left, answer questions from the press ahead of their Soyuz qualification exams, Monday, Oct. 24, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

nhq2017070600109 (July 6, 2017) --- Expedition 52 flight engineer Paolo Nespoli of ESA answers questions from the media as he and \Randy Bresnik of NASA, and Sergey Ryazanskiy of Roscosmos start their second to last day of qualification exams, Thursday, July 6, 2017 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 50 backup crew members, ESA astronaut Paolo Nespoli, left, Russian cosmonaut Fyodor Yurchikhin of Roscosmos, center, and NASA astronaut Jack Fisher don their Sokol suits ahead of their Soyuz qualification exams, Monday, Oct. 24, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 50 backup crew members, NASA astronaut Jack Fisher, left, Russian cosmonaut Fyodor Yurchikhin of Roscosmos, center, and ESA astronaut Paolo Nespoli, left, answer questions from the press ahead of their Soyuz qualification exams, Monday, Oct. 24, 2016, at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

Expedition 24 European Space Agency back-up crew member Paolo Nespoli listens to a reporter’s question during a press conference held at the Cosmonaut Hotel in Baikonur, Kazakhstan on Monday, June 14, 2010. The launch of the Soyuz spacecraft with Expedition 24 NASA Flight Engineers Shannon Walker and Douglas Wheelock, and Soyuz Commander Fyodor Yurchikhin is scheduled for Wednesday, June 16, 2010 at 3:35 a.m. Kazakhstan time. Photo Credit: (NASA/Carla Cioffi)

nhq2017070600110 (July 6, 2017) --- Expedition 52 flight engineer Paolo Nespoli of ESA answers questions from the media as he and \Randy Bresnik of NASA, and Sergey Ryazanskiy of Roscosmos start their second to last day of qualification exams, Thursday, July 6, 2017 at the Gagarin Cosmonaut Training Center (GCTC) in Star City, Russia. Photo Credit: (NASA/Bill Ingalls)

The STS-120 crew members are ready for their return to flight to Houston. From left are Pilot George Zamka, Mission Specialists Paolo Nespoli, Doug Wheelock, Stephanie Wilson and Scott Parazynski, and Commander Pamela Melroy. A welcoming ceremony for the crew is planned at NASA's Hangar 276 on the south end of Ellington Field in Texas. On the 15-day mission, the STS-120 crew continued the construction of the station with the installation of the Harmony Node 2 module and the relocation of the P6 truss. They landed Nov. 7 at NASA's Kennedy Space Center.

JSC2016e000629 (01/12/2016) --- Expedition 52 crewmember ESA (European Space Agency) astronaut Paolo Nespoli in full spacesuit (EMU) . Photo Date: January 12, 2016. JSC NASA Photographer: Robert Markowitz

Expedition 26 European Space Agency astronaut Paolo Nespoli has his Russian Sokol suit pressure checked, while Expedition 26 Flight Engineer Catherine Coleman, far right, speaks with back up crew member Mike Fossum at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Wednesday, Dec. 15, 2010. Nespoli and fellow Expedition 26 crew members Soyuz Commander Dmitry Kondratryev and NASA Flight Engineer Catherine Coleman launched in their Soyuz TMA-20 rocket from the Baikonur Cosmodrome in Kazakhstan the following morning at 1:09 a.m. local time. (Photo Credit: NASA/Carla Cioffi)

Astronaut Pam Melroy presents a commemorative collage of photos and items flown aboard space shuttle Discovery to Bob Cabana, director of NASA's Stennis Space Center in South Mississippi. Melroy commanded NASA's space shuttle mission STS-120. She and fellow crewmembers (from left) Doug Wheelock, Stephanie Wilson, George Zamka, Scott Parazynski and Paolo Nespoli visited Stennis Dec. 13, 2007, to thank employees for the reliability and safe performance of the space shuttle's main engines, which on Oct. 23 launched them aboard Discovery on their mission to the International Space Station.

Expedition 26 crew members from bottom Soyuz Commander Dmitry Kondratyev, NASA Flight Engineer Cady Coleman and European Space Agency Flight Engineer Paolo Nespoli, wave to the crowd prior to launching at the Baikonur Cosmodrome in Kazakhstan on Wednesday, Dec. 15, 2010. (Photo Credit: NASA/Carla Cioffi)