NASA astronaut Jonny Kim waves for a portrait while removing research hardware

iss073e0222463 (June 16, 2025) --- NASA astronaut and Expedition 73 Flight Engineer Jonny Kim waves for a portrait while removing research hardware from inside the Materials Science Laboratory (MSL) located inside the International Space Station's Destiny laboratory module. The MSL uses two different furnaces that operate one at a time to discover new applications for existing materials, such as metals, alloys, polymers, and new or improved materials.