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In zero gravity, flames take on a spherical or blob-like shape rather than the familiar teardrop form seen on Earth. This happens because, in microgravity, the hot gases from combustion don't rise as they do in Earth's gravity, where the process of convection pulls the flame upward. Instead, in space, combustion gases spread out evenly around the flame, creating a cooler, rounder, and often bluer appearance due to lower oxygen levels and different burning dynamics. This unique flame behavior highlights how gravity significantly impacts even basic processes like burning.