Spacecraft Surface Temperature Map

A space station in vacuum has no air to carry heat away by convection — every square metre of hull balances the sun's radiation, its own infrared glow, and the heat leaking out from crew and electronics inside, all independently. This simulator renders a 64-panel cylindrical hull in real 3D and solves a genuine Stefan-Boltzmann energy balance for every single panel each frame, so you watch the sunlit face climb toward +120°C while the shadow face drifts toward -150°C, and see the whole hull's temperature spread collapse when you switch on a slow "barbecue roll" or swap in a low-emissivity gold foil coating.