NASA astronaut Mike Fincke smiles works on the Droplets fluid physics investigation

iss073e1193970 (Nov. 25, 2025) --- NASA astronaut and Expedition 73 Flight Engineer Mike Fincke smiles for a portrait during research operations for the Droplets fluid physics investigation. Fincke was inside the International Space Station's Destiny laboratory module exploring how particles behave inside fluids. The microgravity study may inform commercial in-space manufacturing techniques and improve optical materials and pollution removal operations.