Moonlight Polarization in a Hazy Sky — 2D Polar Map

This is a flat, top-down polar projection of the sky — the same view an all-sky polarimeter camera captures — where every pixel's color encodes the real Rayleigh single-scattering degree and axis of polarization for light coming from the Moon at the position you set. Sweep the Moon around, add haze to watch multiple scattering wash out the pattern, and rotate a simulated polarizing filter across the sky using the real Malus-law transmission formula. Drag to pan and scroll or pinch to zoom into any part of the sky.