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NASA astronaut and Expedition 74 Flight Engineer Chris Williams processes microbe samples inside the Destiny laboratory module’s Microgravity Science Glovebox aboard the International Space Station. Williams was investigating the use of ultraviolet light as a method to disinfect spacecraft surfaces, inhibit microbial growth, and protect both crew health and space hardware.

NASA astronaut Chris Williams processes microbe samples inside the Microgravity Science Glovebox

iss074e0319944 (Feb. 21, 2026) --- NASA astronaut Chris Williams processes microbe samples as part of GULBI inside the Microgravity Science Glovebox (MSG) aboard the International Space Station. GULBI evaluates the use of ultraviolet light as a method to disinfect spacecraft surfaces, inhibit microbial growth, and protect both crew health and space hardware.

Image Credit: ESA/Sophie Adenot
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TakenFebruary 21, 2026
ProducerJSC
Image CreditESA/Sophie Adenot
Size1920x1280px
PIA Numberiss074e0319944