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What happens when a spacecraft catches on fire?
Scientists have lit tiny flames on the ISS before, but the Spacecraft Fire Experiment (Saffire-I) will explore what happens during a larger fire.
For the safety of the ISS crew, the experiment will take place inside a special box on the empty Cygnus vessel, which would burn up in the atmosphere anyway after dropping off the ISS supplies. While the spacecraft fire burns, Saffire will measure temperature, flame growth, oxygen use, and more.