Gothic Arches in Carina’s Star-Birth Cathedral I positioned the observer 2 light-years from the western pillar’s trunk, framing a 6 light-year vertical field at 0.01 ly resolution to catch 40,000 K O-type stars (>5×10^5 L☉ each) blasting an 80 K molecular column. Here we witness a 10,000–12,000 K photoevaporative shock in Hα (656.3 nm) and [OIII] (500.7 nm) as it briefly splits into two orthogonal plasma curtains, edges rendered electric-cyan from CIII and [SII] emission, casting a precise shadow lattice back onto the dust. This frame captures cathedral-scale architecture carved by radiation pressure and ionization, where crisp, impossible arches hang for seconds above a pillar whose granular surface resolves to 1000 AU relief and glittering dust grains.