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Health checks and suit installs before Thursday ISS spacewalk for science upkeep
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Health checks and suit installs before Thursday ISS spacewalk for science upkeep
by Mark Garcia for NASA Blogs
Houston TX (SPX) Jan 15, 2025

Spacewalk preparations continued aboard the International Space Station as two astronauts conducted health checks and installed hardware on their spacesuits. Biology, physics, and lab maintenance also rounded out the Expedition 72 schedule on Tuesday.

Flight Engineer Nick Hague and space station Commander Suni Williams, both from NASA, began their shifts on Tuesday with standard health exams taken prior to the start of a spacewalk. The duo measured their vital signs including heart rate, breathing rate, and temperature, and participated in a hearing test. Next, the two spacewalkers installed lithium-ion batteries and tested electrical and communication components on their spacesuits. Flight Engineer Butch Wilmore also assisted the pair and readied cameras the astronauts will carry with them into the vacuum of space.

Hague and Williams will set their spacesuits to battery power at approximately 8 a.m. EST on Thursday signifying the official start of the first spacewalk of 2025. The experienced spacewalkers will exit the Quest airlock and spend about six-and-a-half hours servicing astrophysics hardware including the NICER X-ray telescope and the Alpha Magnetic Spectrometer. Also on the task list, are the replacement of a rate gyro assembly to maintain station orientation and the replacement of a planar reflector to provide navigation data. NASA+ begins its spacewalk coverage at 6:30 a.m. on Thursday.

Earlier in his shift, Wilmore set up and calibrated genetic sequencing hardware that analyzes station water samples to identify bacteria and fungi species. NASA Flight Engineer Don Pettit started his day on orbital plumbing tasks before removing and processing research samples collected from the Gradient Heating Furnace that enables semiconductor crystal growth research.

Working in the orbital outpost's Roscosmos segment, all three cosmonauts, including Flight Engineers Alexey Ovchinin, Ivan Vagner, and Aleksandr Gorbunov, studied how microgravity affects blood flow through the tiniest vessels in the human circulatory system. The trio also replaced electronics gear and serviced orbital plumbing hardware throughout the day on Tuesday.

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