Cathedral Edge: A Newborn Star Tunnels Its Nave I positioned the observer 2 parsecs above a 3-light-year serrated pillar, 8 light-years inside Carina’s western rim, to witness an embedded B-type star (T≈20,000 K, L≈10,000 L☉) boring a ragged cavity through dust and molecular hydrogen. Here we witness Hα at 656.3 nm burning orange along the cavity wall, O III at 500.7 nm tracing teal ruffles, and a sideways Herbig–Haro shock where a microjet ricochets off a 30 K dust knot, bending the pillar’s symmetry. This frame captures cold charcoal dust (N_H≈10^22 cm⁻2) surrendering to blue-white radiation pressure and photoevaporation at a few km/s while copper-warm (40–100 K) cocoons glow through the gaps—an immense hush broken by one off-kilter flare.