On Earth, flames rise because hot gases are lighter than the surrounding air. In space, however, there’s no buoyancy. That’s why fire takes on a beautiful, pulsating jellyfish-like shape. The Flame Extinguishment - 2 (FLEX-2) experiment aboard the International Space Station investigates how small droplets of fuel burn in microgravity. By studying these perfectly spherical flames, researchers can understand how fuel evaporates, burns, and produces soot without the interference of gravity. This a