When the tip of a pen of light touches the cold, hardened steel, the metal awakens with silken lines—we tame stubbornness with precision cutting to within ±0.05mm, letting fiber lasers tango between molecules. Etched star clusters emerge from the corners of a rocket capsule, and folded lunar orbits unfold across the skeleton of an operating table. Each nanometer-scale starlight trajectory anchors the eternal coordinates of this precarious human world.