INTERNATIONAL SPACE STATION ASTRONAUTS RICK MASTRACCHIO, LEFT, AND MICHAEL HOPKINS DISCUSS THEIR WORK ON THE SPACE STATION DURING EXPEDITIONS 37, 38, AND 39 AT A NEWS CONFERENCE AT NASA'S MARSHALL SPACE FLIGHT CENTER ON JULY 29

ISS038-E-008287 (24 Nov. 2013) --- NASA astronaut Michael Hopkins, Expedition 38 flight engineer, works with tanks from the Advanced Recycle Filter Tank Assembly (ARFTA) in the Tranquility node of the International Space Station.

ISS038-E-008289 (24 Nov. 2013) --- NASA astronaut Michael Hopkins, Expedition 38 flight engineer, works with tanks from the Advanced Recycle Filter Tank Assembly (ARFTA) in the Tranquility node of the International Space Station.

ISS038-E-008291 (24 Nov. 2013) --- NASA astronaut Michael Hopkins, Expedition 38 flight engineer, installs wire harnesses in the International Space Station?s Harmony node to support the installation of Ethernet video cables for the station?s local area network. These new cables will provide Ethernet connectivity to the visiting vehicles that dock to Harmony?s Earth-facing port.

NASA ASTRONAUTS RICHARD MASTRACCHIO, LEFT, AND MICHAEL HOPKINS FLANK ED LITKENHOUS, A PAYLOAD ACTIVITY REQUIREMENTS COORDINATOR IN THE PAYLOAD OPERATIONS AND INTEGRATION CENTER (POIC), AS HE HANGS THE ASTRONAUTS' MISSION PLAQUE ON THE WALL OF THE POIC IN THE MARSHALL CENTER'S BUILDING 4663. THE PLAQUE JOINED THE LOGOS FROM PREVIOUS MISSIONS HANGING AROUND THE ROOM, RECOGNIZING THE COLLABORATION BETWEEN THE ORBITING ASTRONAUTS AND THE HUNTSVILLE-BASED TEAM

Expedition 37/38 NASA Flight Engineer Michael Hopkins smiles after being fitted into his Russian Sokol suit on Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hopkins, Kotov and Ryazanskiy on a five-month mission aboard the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 37/38 NASA Flight Engineer Michael Hopkins is fitted into his Russian Sokol suit as he and fellow crewmates Soyuz Commander Oleg Kotov and Russian Flight Engineer Sergey Ryazanskiy prepare for their Soyuz launch to the International Space Station, on Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hopkins, Kotov and Ryazanskiy on a five-month mission aboard the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 37/38 NASA Flight Engineer Michael Hopkins performs the traditional door signing before he and fellow crewmates, Soyuz Commander Oleg Kotov, Russian Flight Engineer Sergey Ryazanskiy depart the Cosmonaut Hotel for their Soyuz launch to the International Space Station on Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hopkins, Kotov and Ryazanskiy on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 37/38 NASA Flight Engineer Michael Hopkins is fitted into his Russian Sokol suit as he and fellow crewmates Soyuz Commander Oleg Kotov and Russian Flight Engineer Sergey Ryazanskiy prepare for their Soyuz launch to the International Space Station, on Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hopkins, Kotov and Ryazanskiy on a five-month mission aboard the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 37 NASA Flight Engineer Michael Hopkins waves to friends and family at a press conference held at the Cosmonaut Hotel, on Tuesday, Sept. 24, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket is scheduled for September 26 and will send Hopkins, Soyuz Commander Oleg Kotov and Russian Flight Engineer Sergei Ryazansky on a five and a half-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Michael Ryschkewitsch,head of the Johns Hopkins University Applied Physics Laboratory Space Exploration Sector, is seen during a press conference after the team received confirmation from the New Horizons spacecraft that it has completed the flyby of Ultima Thule, Tuesday, Jan. 1, 2019 at Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Maryland. Photo Credit: (NASA/Joel Kowsky)

Expedition 37/38 NASA Flight Engineer Michael Hopkins is fitted into his Russian Sokol suit as he and fellow crewmates Soyuz Commander Oleg Kotov and Russian Flight Engineer Sergey Ryazanskiy prepare for their Soyuz launch to the International Space Station, on Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hopkins, Kotov and Ryazanskiy on a five-month mission aboard the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Michael Ryschkewitsch,head of the Johns Hopkins University Applied Physics Laboratory Space Exploration Sector, is seen during a press conference after the team received confirmation from the New Horizons spacecraft that it has completed the flyby of Ultima Thule, Tuesday, Jan. 1, 2019 at Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Maryland. Photo Credit: (NASA/Joel Kowsky)

Expedition 37 NASA Flight Engineer Michael Hopkins answers a reporter's question at a press conference held at the Cosmonaut Hotel, on Tuesday, Sept. 24, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket is scheduled for September 26 and will send Hopkins, Soyuz Commander Oleg Kotov and Russian Flight Engineer Sergei Ryazansky on a five and a half-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 37/38 NASA Flight Engineer Michael Hopkins is fitted into his Russian Sokol suit as he and fellow crewmates Soyuz Commander Oleg Kotov and Russian Flight Engineer Sergey Ryazanskiy prepare for their Soyuz launch to the International Space Station, on Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hopkins, Kotov and Ryazanskiy on a five-month mission aboard the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 37 NASA Flight Engineer Michael Hopkins talks during the State Commission meeting at the Cosmonaut Hotel, Tuesday, Sept. 24, 2013, in Kazakhstan. Launch of the Soyuz rocket is scheduled for September 26 and will send Hopkins, Soyuz Commander Oleg Kotov and Russian Flight Engineer Sergei Ryazansky on a five and a half-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 37/38 NASA Flight Engineer Michael Hopkins performs the traditional door signing before he and fellow crewmates, Soyuz Commander Oleg Kotov, Russian Flight Engineer Sergey Ryazanskiy depart the Cosmonaut Hotel for their Soyuz launch to the International Space Station on Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hopkins, Kotov and Ryazanskiy on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 37 NASA Flight Engineer Michael Hopkins answers a reporter's question at a press conference held at the Cosmonaut Hotel, on Tuesday, Sept. 24, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket is scheduled for September 26 and will send Hopkins, Soyuz Commander Oleg Kotov and Russian Flight Engineer Sergei Ryazansky on a five and a half-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 37/38 crew members, Flight Engineer Michael Hopkins of NASA, left, Soyuz Commander Oleg Kotov of Roscosmos, and Russian Flight Engineer Sergey Ryazanskiy, right, wave farewell to family and friends as they depart the Cosmonaut Hotel to suit-up for their soyuz launch to the International Space Station on Wednesday, Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hopkins, Kotov and Ryazanskiy on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 37/38 crew members, Flight Engineer Michael Hopkins of NASA, left, Soyuz Commander Oleg Kotov of Roscosmos, and Russian Flight Engineer Sergey Ryazanskiy, right, depart the Cosmonaut Hotel to suit-up for their soyuz launch to the International Space Station on Wednesday, Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hopkins, Kotov and Ryazanskiy on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 37/38 crew members, Flight Engineer Michael Hopkins of NASA, left, Soyuz Commander Oleg Kotov of Roscosmos, and Russian Flight Engineer Sergey Ryazanskiy, right, wave farewell to family and friends as they depart the Cosmonaut Hotel to suit-up for their soyuz launch to the International Space Station on Wednesday, Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hopkins, Kotov and Ryazanskiy on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Victor Zelentsov)

Expedition 37/38 crew members, Flight Engineer Michael Hopkins of NASA, left, Soyuz Commander Oleg Kotov of Roscosmos, and Russian Flight Engineer Sergey Ryazanskiy, right, wave farewell to family and friends as they depart the Cosmonaut Hotel to suit-up for their soyuz launch to the International Space Station on Wednesday, Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hopkins, Kotov and Ryazanskiy on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Victor Zelentsov)

Expedition 37/38 NASA Flight Engineer Michael Hopkins, left, is fitted into his Russian Sokol suit as Russian Flight Engineer Sergey Ryazanskiy looks on, on Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send Hopkins, Kotov and Ryazanskiy on a five-month mission aboard the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 37 NASA Flight Engineer Michael Hopkins, left, and Soyuz Commander Oleg Kotov share a laugh at a press conference held at the Cosmonaut Hotel, on Tuesday, Sept. 24, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket is scheduled for September 26 and will send Hopkins, Kotov and Russian Flight Engineer Sergei Ryazansky on a five and a half-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 37/38 NASA Flight Engineer Michael Hopkins is lifted out of the chair after having his Russian Sokol suit pressure checked ahead of his launch onboard a Soyuz TMA-10M spacecraft to the International Space Station, on Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send the Expedition 37/38 crewmates on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 37/38 NASA Engineer Michael Hopkins has his Russian Sokol suit pressure checked ahead of his launch onboard a Soyuz TMA-10M spacecraft to the International Space Station with fellow crewmates Russian Flight Engineer Sergey Ryazanskiy and Soyuz Commander Oleg Kotov, on Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send the Expedition 37/38 crewmates on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 37/38 NASA Engineer Michael Hopkins has his Russian Sokol suit pressure checked ahead of his launch onboard a Soyuz TMA-10M spacecraft to the International Space Station with fellow crewmates Russian Flight Engineer Sergey Ryazanskiy and Soyuz Commander Oleg Kotov, on Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send the crewmates on a five-month mission aboard the International Space Station. Photo Credit: (NASA/GCTC/Andrey Shelepin)

Expedition 37/38 NASA Flight Engineer Michael Hopkins is seen smiling before having his Russian Sokol suit pressure checked ahead of his launch onboard a Soyuz TMA-10M spacecraft to the International Space Station, on Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send the Expedition 37/38 crewmates on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 37/38 NASA Engineer Michael Hopkins is seen speaking to his family after having his Russian Sokol suit pressure checked ahead of his launch onboard a Soyuz TMA-10M spacecraft to the International Space Station, on Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send the Expedition 37/38 crewmates on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 37/38 NASA Engineer Michael Hopkins is seen speaking to his family after having his Russian Sokol suit pressure checked ahead of his launch onboard a Soyuz TMA-10M spacecraft to the International Space Station, on Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send the Expedition 37/38 crewmates on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 35 back up crewmembers Sergei Ryazansky, left, and Michael Hopkins watched live video of Soyuz TMA-08M nearing the International Space Station, Friday, March 29, 2013, at the Cosmonaut Hotel in Baikonur, Kazakhstan. The Soyuz reached the station in less than six hours and after only four orbits, instead of its usual two-day route. Photo Credit: (NASA/Carla Cioffi)

Expedition 37/38 NASA Engineer Michael Hopkins has his Russian Sokol suit pressure checked ahead of his launch onboard a Soyuz TMA-10M spacecraft to the International Space Station with fellow crewmates Russian Flight Engineer Sergey Ryazanskiy and Soyuz Commander Oleg Kotov, on Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send the Expedition 37/38 crewmates on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 37/38 NASA Engineer Michael Hopkins is seen smiling after having his Russian Sokol suit pressure checked ahead of his launch onboard a Soyuz TMA-10M spacecraft to the International Space Station, on Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send the Expedition 37/38 crewmates on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 37/38 NASA Engineer Michael Hopkins has his Russian Sokol suit pressure checked ahead of his launch onboard a Soyuz TMA-10M spacecraft to the International Space Station with fellow crewmates Russian Flight Engineer Sergey Ryazanskiy and Soyuz Commander Oleg Kotov, on Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send the Expedition 37/38 crewmates on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 37 NASA Flight Engineer Michael Hopkins, far left, Soyuz Commander Oleg Kotov and Russian Flight Engineer Sergey Ryazanskiy, far right, wave and give the thumbs up following a press conference held at the Cosmonaut Hotel, on Tuesday, Sept. 24, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket is scheduled for September 26 and will send Hopkings, Kotov, Ryazanski on a five and a half-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 37/38 Soyuz Commander Oleg Kotov, right, and NASA Flight Engineer Michael Hopkins pose for a photo before having their Russian Sokol suits pressure checked ahead of their launch onboard a Soyuz TMA-10M spacecraft to the International Space Station, on Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send the Expedition 37/38 crewmates on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 37/38 NASA Engineer Michael Hopkins is seen speaking to his family after having his Russian Sokol suit pressure checked ahead of his launch onboard a Soyuz TMA-10M spacecraft to the International Space Station, on Wednesday, Sept. 25, 2013, in Baikonur, Kazakhstan. Launch of the Soyuz rocket will send the Expedition 37/38 crewmates on a five-month mission aboard the International Space Station. Photo Credit: (NASA/Carla Cioffi)

Expedition 37 NASA Flight Engineer Michael Hopkins, far left, Soyuz Commander Oleg Kotov, Russian Flight Engineer Sergey Ryazanskiy, backup crewmembers Steve Swanson of NASA, Alexander Skvortsov of Russia and Oleg Artemyev of Russia, far right, are seen posing for a photo following a press conference held at the Cosmonaut Hotel, on Tuesday, Sept. 24, 2013, in Baikonur, Kazakhstan. Photo Credit: (NASA/Carla Cioffi)

Expedition 37 Russian Flight Engineer Sergey Ryazanskiy, top, NASA Flight Engineer Michael Hopkins, Soyuz Commander Oleg Kotov, bottom, wave farewell from the base of the Soyuz rocket at the Baikonur Cosmodrome in Baikonur, Kazakhstan, Thursday, Sept. 26, 2013. Their Soyuz TMA-10M rocket launched at 2:58 a.m. local time. Photo Credit: (NASA/Carla Cioffi)

Expedition 37 NASA Flight Engineer Michael Hopkins, far left, Soyuz Commander Oleg Kotov, Russian Flight Engineer Sergey Ryazanskiy, backup crewmembers Steve Swanson of NASA, Alexander Skvortsov of Russia and Oleg Artemyev of Russia, far right, are seen at a press conference held at the Cosmonaut Hotel, on Tuesday, Sept. 24, 2013, in Baikonur, Kazakhstan. Photo Credit: (NASA/Carla Cioffi)

New Horizons mission managers: Chris DeBoy, left, Mark Kochte, Rick Shelton, and Michael Vincent, right, wait for a signal from the spacecraft that it is healthy and collected data during the flyby of Ultima Thule, Tuesday, Jan. 1, 2019 in the Mission Operations Center at Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Maryland. Photo Credit: (NASA/Bill Ingalls)

NASA associate administrator for education and former astronaut Leland Melvin, left, watches as astronauts, Rick Mastracchio, screen left, and Michael Hopkins, deliver a message from the International Space Station (ISS) to attendees of the annual White House State of Science, Technology, Engineering, and Math (SoSTEM) address, Wednesday, Jan. 29, 2014, in the South Court Auditorium in the Eisenhower Executive Office Building on the White House complex in Washington. Photo Credit: (NASA/Bill Ingalls)

Soichi Noguchi (shown) of the Japan Aerospace Exploration Agency (JAXA), along with NASA astronauts Michael Hopkins, Victor Glover, and Shannon Walker, board a plane from Ellington Field near the agency’s Johnson Space Center in Houston, Texas, en route to Kennedy Space Center in Florida for NASA’s SpaceX Crew-1 mission to begin final launch preparations. Crew-1 is the first operational mission of the SpaceX Crew Dragon spacecraft and Falcon 9 rocket to the International Space Station as part of the agency’s Commercial Crew Program.

The astronauts for NASA’s SpaceX Crew-1 mission visit the Crew Dragon spacecraft, named Resilience by the crew, inside the SpaceX hangar at Launch Complex 39A on Nov. 8, 2020. NASA astronauts Michael Hopkins, Victor Glover, and Shannon Walker, along with Soichi Noguchi of the Japan Aerospace Exploration Agency (JAXA), will launch on SpaceX’s Falcon 9 rocket and Crew Dragon on the first crew rotation mission to the International Space Station as part of NASA’s Commercial Crew Program.

ISS037-E-006562 (3 Oct. 2013) --- NASA astronaut Michael Hopkins, Expedition 37 flight engineer, performs routine in-flight maintenance on the advanced Resistive Exercise Device (aRED) in the Tranquility node of the International Space Station.

ISS037-E-012572 (14 Oct. 2013) --- In the U.S. lab Destiny aboard the Earth-orbiting International Space Station Expedition 37 Flight Engineer Michael Hopkins prepares the Fluids Integrated Rack for an experiment.

Expedition 37 Crew News Conference (Oleg Kotov, Sergey Ryazansky, Michael Hopkins). Photo Date: July 17, 2013. Location: Building 2N - Press Conference Room. Photographer: Robert Markowitz

ISS037-E-024834 (28 Oct. 2013) --- NASA astronaut Michael Hopkins, Expedition 37 flight engineer, works behind a rack in the Destiny laboratory of the International Space Station.

iss064e009702 (Dec. 4, 2020) --- NASA astronauts and Expedition 64 Flight Engineers Shannon Walker and Michael Hopkins are pictured in the Kibo laboratory module during a space-to-ground call with SpaceX personnel.

iss064e013898 (Dec. 18, 2020) --- NASA astronaut and Expedition 64 Flight Engineer Michael Hopkins poses for a holiday season portrait with a Christmas tree inside Japan's Kibo laboratory module.

Expedition 37 Crew News Conference (Oleg Kotov, Sergey Ryazansky, Michael Hopkins). Photo Date: July 17, 2013. Location: Building 2N - Press Conference Room. Photographer: Robert Markowitz

PHOTO DATE: 5-3-13 LOCATION: Bldg. 9NW - ISS Mockups SUBJECT: Soyuz 36 crew (Oleg Kotov, Sergey Ryazanskiy and Michael Hopkins) in their Routine Ops training. PHOTOGRAPHER: Lauren Harnett

ISS038-E-009306 (28 Nov. 2013) --- NASA astronauts Michael Hopkins (left) and Rick Mastracchio, both Expedition 38 flight engineers, pose for a photo with a Thanksgiving meal in the Unity node of the International Space Station.

Expedition 37 Crew News Conference (Oleg Kotov, Sergey Ryazansky, Michael Hopkins). Photo Date: July 17, 2013. Location: Building 2N - Press Conference Room. Photographer: Robert Markowitz

ISS037-E-013962 (15 Oct. 2013) --- NASA astronaut Michael Hopkins, Expedition 37 flight engineer, enters data in a computer in the Harmony node of the International Space Station.

Expedition 37 Crew News Conference (Oleg Kotov, Sergey Ryazansky, Michael Hopkins). Photo Date: July 17, 2013. Location: Building 2N - Press Conference Room. Photographer: Robert Markowitz

iss064e044264 (March 19, 2021) --- Astronaut and Expedition 64 Flight Engineer Michael Hopkins of NASA cleans cooling loops and collects water samples from U.S. spacesuits located inside the International Space Station's Quest airlock.

ISS037-E-024833 (28 Oct. 2013) --- NASA astronaut Michael Hopkins, Expedition 37 flight engineer, works behind a rack in the Destiny laboratory of the International Space Station.

iss064e041816 (March 13, 2021) --- NASA astronaut and Expedition 64 Flight Engineer Victor Glover is pictured during a spacewalk to service the station’s cooling system and communications gear with fellow NASA spacewalker Michael Hopkins (out of frame).

iss064e023968 (Jan. 19, 2021) --- NASA astronauts Victor Glover (left) and Michael Hopkins work on U.S. spacesuit maintenance inside the International Space Station's Quest airlock.

ISS037-E-020101 (24 Oct. 2013) --- NASA astronaut Michael Hopkins, Expedition 37 flight engineer, works with an Extravehicular Mobility Unit (EMU) spacesuit in the Quest airlock of the International Space Station.

iss064e029012 (Feb. 1, 2021) --- NASA astronaut Michael Hopkins works during a spacewalk to complete battery upgrade work on the outside of the International Space Station with fellow NASA astronaut Victor Glover (out of frame).

iss064e013883 (Dec. 18, 2020) --- NASA astronaut and Expedition 64 Flight Engineer Michael Hopkins pauses for a portrait during a break in science activities inside the International Space Station's U.S. Destiny laboratory module.

PHOTO DATE: 5-3-13 LOCATION: Bldg. 9NW - ISS Mockups SUBJECT: Soyuz 36 crew (Oleg Kotov, Sergey Ryazanskiy and Michael Hopkins) in their Routine Ops training. PHOTOGRAPHER: Lauren Harnett

ISS038-E-011804 (4 Dec. 2013) --- NASA astronaut Michael Hopkins, Expedition 38 flight engineer, speaks in a microphone while working in the Harmony node of the International Space Station.

INTERNATIONAL SPACE STATION ASTRONAUTS RICK MASTRACCHIO, LEFT, AND MICHAEL HOPKINS DISCUSS THEIR WORK ON THE SPACE STATION DURING EXPEDITIONS 37, 38, AND 39 AT A NEWS CONFERENCE AT NASA'S MARSHALL SPACE FLIGHT CENTER ON JULY 29

iss064e031801 (Feb. 11,2021) --- NASA astronaut and Expedition 64 Flight Engineer Michael Hopkins signs his name near his mission's insignia sticker in the vestibule between the Tranquility module and the NanoRacks Bishop airlock.

ISS037-E-028590 (10 Nov. 2013) --- NASA astronaut Michael Hopkins, Expedition 37/38 flight engineer, enters data into a computer near the Microgravity Science Glovebox (MSG) in the Destiny laboratory of the International Space Station.

ISS038-E-004128 (18 Nov. 2013) --- NASA astronaut Michael Hopkins, Expedition 38 flight engineer, participates in Extravehicular Mobility Unit (EMU) spacesuit tests and repairs in the Quest airlock of the International Space Station.

iss064e027044 (Jan. 27, 2021) --- NASA spacewalker and Expedition 64 Flight Engineer Michael Hopkins works to ready the International Space station's port-side truss structure for future solar array upgrades.

PHOTO DATE: 5-3-13 LOCATION: Bldg. 9NW - ISS Mockups SUBJECT: Soyuz 36 crew (Oleg Kotov, Sergey Ryazanskiy and Michael Hopkins) in their Routine Ops training. PHOTOGRAPHER: Lauren Harnett

iss064e053415 (April 6, 2021) --- NASA astronaut and Expedition 64 Flight Engineer Michael Hopkins applies his signature to the Unity module's vestibule that leads to the Cygnus space freighter from Northrop Grumman.

ISS037-E-006563 (3 Oct. 2013) --- NASA astronaut Michael Hopkins, Expedition 37 flight engineer, performs routine in-flight maintenance on the advanced Resistive Exercise Device (aRED) in the Tranquility node of the International Space Station.

iss064e041634 (March 13, 2021) --- NASA spacewalkers Michael Hopkins and Victor Glover (both at center) are dwarfed by the International Space Station's main solar arrays and radiators during a spacewalk to service the station’s cooling system and communications gear.

ISS038-E-013670 (8 Dec. 2013) --- NASA astronaut Michael Hopkins, Expedition 38 flight engineer, speaks in a microphone while working in the Kibo laboratory of the International Space Station.

PHOTO DATE: 5-3-13 LOCATION: Bldg. 9NW - ISS Mockups SUBJECT: Soyuz 36 crew (Oleg Kotov, Sergey Ryazanskiy and Michael Hopkins) in their Routine Ops training. PHOTOGRAPHER: Lauren Harnett

Expedition 37 Crew News Conference (Oleg Kotov, Sergey Ryazansky, Michael Hopkins). Photo Date: July 17, 2013. Location: Building 2N - Press Conference Room. Photographer: Robert Markowitz

Expedition 37 Crew News Conference (Oleg Kotov, Sergey Ryazansky, Michael Hopkins). Photo Date: July 17, 2013. Location: Building 2N - Press Conference Room. Photographer: Robert Markowitz

iss064e012310 (Dec. 14, 2020) --- NASA astronauts and Expedition 64 Flight Engineers Shannon Walker and Michael Hopkins work on installing components for the station's new Universal Waste Management System, or bathroom, located inside the Tranquility module.

iss064e027386 (Jan. 27, 2021) --- NASA spacewalker and Expedition 64 Flight Engineer Michael Hopkins works to ready the International Space station's port-side truss structure for future solar array upgrades.

iss064e013338 (Dec. 17, 2020) --- Flight Engineer Michael Hopkins works inside the Quest airlock to prepare tools and U.S. spacesuits for planned spacewalks to continue maintenance on the outside of the International Space Station.

iss064e030009 (Feb. 8, 2021) --- NASA astronaut and Expedition 64 Flight Engineer Michael Hopkins works on hydroponics components for the Plant Water Management study that is exploring ways to sustain plants in microgravity from germination through harvest.

Expedition 37 Crew News Conference (Oleg Kotov, Sergey Ryazansky, Michael Hopkins). Photo Date: July 17, 2013. Location: Building 2N - Press Conference Room. Photographer: Robert Markowitz

iss064e0221711 (Jan. 8, 2021) --- Flight Engineer Michael Hopkins works inside the Quest airlock configuring tools for planned spacewalks to continue maintenance on the outside of the International Space Station.

iss064e023916 (Jan. 18, 2021) --- NASA astronaut and Expedition 64 Flight Engineer Michael Hopkins works on U.S. spacesuit maintenance inside the Quest airlock of the International Space Station.

ISS038-E-009300 (28 Nov. 2013) --- NASA astronaut Michael Hopkins, Expedition 38 flight engineer, poses for a photo with his Thanksgiving meal in the Unity node of the International Space Station.

ISS037-E-021314 (26 Oct. 2013) --- NASA astronaut Michael Hopkins, Expedition 37 flight engineer, holds a spoon containing a piece of food in the Harmony node of the International Space Station.

ISS037-E-013602 (15 Oct. 2013) --- NASA astronaut Michael Hopkins, Expedition 37 flight engineer, works on the Combustion Integrated Rack (CIR) in the Destiny laboratory of the International Space Station.

iss064e025819 (Jan. 26, 2021) --- NASA astronaut and Expedition 64 Flight Engineer Michael Hopkins checks safety tethers that he will use to stay attached to the International Space Station during a pair of spacewalks.

iss064e027903 (Feb. 1, 2021) --- NASA astronaut Victor Glover is pictured during a spacewalk to complete battery upgrade work on the outside of the International Space Station with fellow NASA astronaut Michael Hopkins (out of frame).

iss064e0221696 (Jan. 8, 2021) --- Flight Engineers Michael Hopkins (foreground) and Victor Glover configure tools inside the Quest airlock for planned spacewalks to continue maintenance on the outside of the International Space Station.

ISS037-E-004816 (27 Sept. 2013) --- NASA astronaut Michael Hopkins, Expedition 37 flight engineer, stows items in a locker in the Destiny laboratory of the International Space Station.

Expedition 37 Crew News Conference (Oleg Kotov, Sergey Ryazansky, Michael Hopkins). Photo Date: July 17, 2013. Location: Building 2N - Press Conference Room. Photographer: Robert Markowitz

ISS037-E-020099 (24 Oct. 2013) --- NASA astronaut Michael Hopkins, Expedition 37 flight engineer, speaks in a microphone while working in the Quest airlock of the International Space Station.

ISS038-E-011787 (4 Dec. 2013) --- NASA astronaut Michael Hopkins, Expedition 38 flight engineer, works the controls at the robotic workstation in the Cupola of the International Space Station.

iss064e023920 (Jan. 19, 2021) --- NASA astronaut and Expedition 64 Flight Engineer Michael Hopkins works on U.S. spacesuit maintenance inside the Quest airlock of the International Space Station.

PHOTO DATE: 5-3-13 LOCATION: Bldg. 9NW - ISS Mockups SUBJECT: Soyuz 36 crew (Oleg Kotov, Sergey Ryazanskiy and Michael Hopkins) in their Routine Ops training. PHOTOGRAPHER: Lauren Harnett

iss064e042059 (March 13, 2021) --- NASA astronaut and Expedition 64 Flight Engineer Michael Hopkins is pictured during a spacewalk servicing communications gear on the outside of the International Space Station's Columbus laboratory module.

Expedition 37 Crew News Conference (Oleg Kotov, Sergey Ryazansky, Michael Hopkins). Photo Date: July 17, 2013. Location: Building 2N - Press Conference Room. Photographer: Robert Markowitz

iss064e023961 (Jan. 19, 2021) --- NASA astronaut and Expedition 64 Flight Engineer Michael Hopkins works on U.S. spacesuit maintenance inside the Quest airlock of the International Space Station.