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Biomedical Research, CubeSat Deployments Top Crew Schedule

Biomedical research to keep crews healthy and CubeSat deployments for educational research topped the science schedule aboard the International Space Station on Tuesday. The Expedition 74 crew also focused on cargo swaps and life support maintenance throughout the day.

NASA Flight Engineer Chris Williams processed his body samples during the first half of his shift for the long-running CIPHER astronaut health study. He collected then stowed his urine samples inside a science freezer for preservation and later analysis. The human research investigation looks at a broad range of physiological and psychological parameters before, during, and after a spaceflight to understand how the human body adapts to weightlessness. Doctors will use the insights to keep crews healthy as they travel farther away from Earth.

Williams also pointed a camera out a window on the cupola as a set of CubeSats were deployed outside the Kibo laboratory module by a small satellite orbital deployer into Earth orbit. Students from Mexico, Italy, Thailand, Malaysia, and Japan designed the shoe-boxed satellites for a series of Earth observations and technology demonstrations.

Williams also logged onto a station computer and studied procedures to monitor the approach and rendezvous of the SpaceX Crew-12 mission aboard a Dragon spacecraft targeted to launch no earlier than Feb. 11 from Cape Canaveral in Florida. The first-time space flyer then continued packing completed science experiments and station hardware for return to Earth inside a Dragon spacecraft docked to the Harmony module’s forward port.

Flight Engineer Sergei Mikaev started his shift in the Nauka science module replacing battery controllers to maintain safe operations of the Roscosmos segment’s electrical power system. After lunchtime, Mikaev inspected and cleaned a pair of laptop computers before removing hardware and crew supplies from the Progress 92 cargo craft and stowing them inside the orbital outpost.

Station Commander Sergey Kud-Sverchkov spent his shift primarily on lab maintenance in the station’s Roscosmos’ modules. He first verified the location and configuration of a variety tool kits then inventoried and photographed the tools for analysis on the ground. Afterward, Kud-Sverchkov cleaned and inspected station smoked detectors and their components verifying they were in functional condition.

Learn more about station activities by following the space station blog, @space_station on X, as well as the ISS Facebook and ISS Instagram accounts.

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Mark A. Garcia

Expedition 74 Kicks Off Week with Dragon Preps and Science Gear Work

The Expedition 74 crew kicked off the week with SpaceX Dragon spacecraft preparations and science hardware maintenance ensuring research continues providing pristine results aboard the International Space Station. The orbital trio is gearing up for a pair of missions targeted to arrive and depart the station this month while keeping up ongoing microgravity science impossible to achieve in Earth’s gravity environment and benefitting humans on and off the Earth.

The next mission to the orbital outpost, NASA’s SpaceX Crew-12, is targeted to launch from Cape Canaveral, Florida, no earlier than Feb. 11. Two NASA astronauts, commander Jessica Meir and pilot Jack Hathaway, will ride a SpaceX Dragon alongside mission specialists Sophie Adenot of ESA (European Space Agency) and Andrey Fedyaev of Roscosmos. After docking to the Harmony module’s space-facing port, they will join Expedition 74 and begin a nine-month space research mission.

Expedition 74 Flight Engineer Chris Williams studied the monitoring tools and techniques he will use when Crew-12 aboard Dragon begins its approach and rendezvous maneuvers toward Harmony. Williams reviewed the variety of computers that control the station’s orientation and the procedures he will use during Dragon’s approach to Harmony.

Later in his shift, Williams focused on cargo operations packing some of the completed experiments and associated research samples, as well as used hardware and trash, inside the SpaceX Dragon cargo spacecraft for retrieval and analysis on the ground. Dragon delivered a host of science experiments, crew supplies, and more on August 25, 2025.

In between the Dragon operations, Williams serviced advanced science gear supporting different research operations aboard the orbiting lab. He first replaced power, control, and stowage components inside the TangoLab facility that supports numerous investigations including virulent bacteria research and early cancer detection. Next, he swapped a hard drive inside the Advanced Space Experiment Processor-4 that houses and processes research samples for an array of microbiology and physics studies and can be operated on Dragon and Cygnus cargo spacecraft, as well as the space station.

Roscosmos Flight Engineer Sergei Mikaev began his shift pedaling on an exercise cycle while attached to electrodes and a blood pressure cuff. Station Commander Sergey Kud-Sverchkov of Roscosmos assisted Mikaev during the fitness evaluation that monitors how a crew member’s heart activity and blood pressure are affected by living in weightlessness. Afterward, Mikaev packed obsolete hardware and trash for disposal inside the Progress 92 cargo craft then cleaned the ventilation system inside the Zvezda service module.

Kud-Sverchkov also set up the Plasma Kristall-4 physics study and switched from neon to argon gas inside the Columbus laboratory module. The experiment explores complex plasmas to advance spacecraft designs, better understand planetary formation, and improve fundamental physics research. The two-time space station resident later conducted a photographic inspection of windows inside Zvezda for analysis.

Learn more about station activities by following the space station blog, @space_station on X, as well as the ISS Facebook and ISS Instagram accounts.

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Mark A. Garcia