Burning fuel in zero gravity looks nothing like it does on Earth. 🔥 Here, hot air rises and cool air sinks — that’s what gives a flame its classic teardrop shape. But in space, there’s no “up” or “down.” No gravity means no convection currents. So, instead of flickering upward, the flame forms a perfect glowing sphere, burning slowly and evenly in all directions. A quiet fire, floating in the dark. 🚀 - #spacefacts #science #nasa #zerogravity #physics | How History Is Created

What happens when fire burns in space? A fascinating experiment aboard the International Space Station (ISS) reveals that in microgravity, flames behave in ways impossible on Earth. Using a 50/50 mix of iso-octane and heptane, scientists observed something striking: a nearly perfectly spherical flame. Why? On Earth, hot air rises, shaping flames into the flickering, teardrop forms we’re used to. But in zero gravity, there’s no “up”—so the flame expands symmetrically in all directions. The result

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The fire experiment — called the Spacecraft Fire Experiment-1, or Saffire-1— will spark the biggest human-made fire in space. http://goo.gl/Y2Edbq Credit: NASA - National Aeronautics and Space Administration Timelapse by Space.com | Space.com