NASA astronaut Jonny Kim poses for a portrait while servicing a fluorescence microscope

iss073e1049692 (Nov. 6, 2025) --- NASA astronaut and Expedition 73 Flight Engineer Jonny Kim poses for a portrait while servicing the KERMIT (Keyence Research Microscope Testbed) fluorescence microscope inside the Materials Science Research Rack aboard the International Space Station’s Destiny laboratory module. KERMIT is a commercial off-the-shelf microscope that provides researchers with essential imaging capabilities for biological, physical, and materials science research in microgravity.