🌙 What If the Moon Vanished? 2D Tide Diagram, Axial Tilt and Night Sky

The 2D companion of the Moon-vanishes lab: a top-down Earth, Moon and Sun diagram with tidal bulges and a rotating tide gauge, plus charts of sea level, axial tilt, day length and night brightness, with eight numerical checks.

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install