Runaway Greenhouse Limit — Parameter-Space Map (2D)

This is the 2D companion to the 3D Runaway Greenhouse Limit simulator, and it models the identical physics: the Simpson–Nakajima saturation of outgoing longwave radiation that sets the inner edge of a star's habitable zone. Rather than watching one planet orbit one star, this version renders the entire orbital-distance-versus-CO2-loading parameter space as a live stability field, computed pixel-by-pixel from the same absorbed-flux and OLR equations, with an independently-derived analytic boundary curve overlaid on top of it and an OLR-versus-temperature inset showing exactly where the current parameters sit relative to the ceiling. Drag any slider and watch the whole field, boundary curve and equilibrium point update together in real time.