NASA Astronaut Chris Williams: Thinking Like a Scientist

NASA Astronaut Chris Williams: Thinking Like a Scientist

NASA astronaut Chris Williams is set to return to Earth after an eight-month mission aboard the International Space Station. During his assignment, Williams conducted a variety of research that informs new technologies, improves healthcare on Earth, and paves the way for future missions to the Moon and Mars.  

NASA astronaut Chris Williams and Roscosmos cosmonauts Sergey Kud-Sverchkov and Sergei Mikaev of Russia are nearing the end of their mission that began with a launch from Kazakhstan aboard their Russian Soyuz MS-28 spacecraft on Nov. 27, 2025. The trio will undock from the Rassvet module in the Soyuz MS-28 over the weekend signifying the beginning of Expedition 75. They will take a short ride back to Earth for a parachute-assisted landing in Kazakhstan inside the Soyuz. 

Here’s a look at his scientific mission: https://go.nasa.gov/4gOF65a 

[0:34] European Enhanced Exploration Exercise Device (E4D)
https://www.nasa.gov/mission/station/research-explorer/investigation/#id=8035

[0:40] Cold Stowage
https://www.nasa.gov/wp-content/uploads/2025/10/cold-stowage-brochure-sept-2022.pdf

[0:44] Human Research
https://www.nasa.gov/humans-in-space/the-human-body-in-space/

[0:46] Veg-06
https://www.nasa.gov/mission/station/research-explorer/investigation/#id=8301

[0:54] Germicidal Ultraviolet Light Biofilm Inhibition (GULBI)
https://www.nasa.gov/mission/station/research-explorer/investigation/#id=9305

[0:59] Streptococcus pneumoniae (Spn) Infection of Cardiac Tissue (MVP Cell-09)
https://www.nasa.gov/mission/station/research-explorer/investigation/#id=9160

[1:03] Zero Boil-Off Tank Noncondensables
https://www.nasa.gov/mission/station/research-explorer/investigation/#id=8190
(ZBOT-NC) h[1:10] Spacewalks 

https://www.nasa.gov/international-space-station/space-station-spacewalks/

[1:24] Test facility for lab-aUtomation System in Kibo (TUSK)
https://www.nasa.gov/mission/station/research-explorer/facility/#id=9404

[1:27] MOCHII 
https://www.nasa.gov/mission/station/research-explorer/facility/#id=7657

[1:30] Neutralino Space ISS Surveyor (ISS Surveyor) 
https://www.nasa.gov/mission/station/research-explorer/investigation/#id=9034

[1:35] UniSQ iLaunch Plants (Project Rapunzel)
https://www.nasa.gov/mission/station/research-explorer/investigation/#id=9518

[1:37] Megakaryocyte Flying-One (MeF1) 
https://www.nasa.gov/mission/station/research-explorer/investigation/#id=9116

[1:39] Japanese Experiment Module - Exposed Facility (JEM-EF)
https://www.nasa.gov/mission/station/research-explorer/facility/#id=134

Follow Expedition 74:

https://blogs.nasa.gov/spacestation/

Expedition 74 Crew
Station Commander: Sergey-Kud Sverchkov (Russia)
Roscosmos (Russia) Flight Engineers: Andrey Fedyaev, Sergei Mikaev, Anna Kikina, Pyotr Dubrov

European Space Agency Flight Engineer: Sophie Adenot

NASA Flight Engineers: Jessica Meir, Jack Hathaway, Chris Williams, Anil Menon

An international partnership of space agencies provides and operates the elements of the International Space Station (ISS). The principals are the space agencies of the United States, Russia, Europe, Japan, and Canada.

Video Credit: NASA's Johnson Space Center
Duration: 2 minutes
Release Date: July 23, 2026

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