Lunar Halo Phenomenon — The Night Sky’s Crystal Geometry ✨ What you’re seeing is an extraordinary optical event — a complex lunar halo surrounding the full moon, with intersecting light arcs and bright parhelia-like points . This happens when moonlight refracts through hexagonal ice crystals high in the atmosphere, often within thin cirrostratus clouds. Depending on the orientation of the crystals, multiple halos, pillars, and arcs can appear — creating an almost geometric signature of the heave