Everything from the series in one scene: a loading screen, an emissive sun lifted by bloom, an instanced asteroid belt, click-to-select planets via raycasting, responsive resize, and a debug HUD. Click a planet.
The whole thing is one render loop with composer.render(), one InstancedMesh for the belt, a single Raycaster for picking, and a ResizeObserver for responsiveness — the production skeleton from Part 10.