Claude
ac296f5133
Fifteen bodies here have a real photograph. Every exoplanet does not, and never will on current instruments — none has ever been imaged — and nor do several of the solar system's own moons. Those all shared one crude stand-in: a few noisy bands tinted by category, cached per colour, so every exoplanet in the app was literally the same picture. They now get a surface reasoned from what has actually been measured. The chain is standard at every link. A host star's luminosity comes from its catalogued apparent magnitude and its parallax distance — that pair is exactly an absolute magnitude — plus a bolometric correction for its spectral class. The correction is not optional: an M dwarf radiates most of its light in the infrared, so its visual magnitude understates it more than tenfold, and M dwarfs are what most nearby planet hosts are. Luminosity and the semi-major axis then give an equilibrium temperature, mass and radius give a bulk density, and size, temperature and density together give a class of world. Checked against the solar system the temperatures land on Earth 255 K, Jupiter 112 K, Neptune 46 K, all within a kelvin or two of published values, and 51 Pegasi b comes out at 1227 K against a published 1200. Each class carries a palette reasoned from its chemistry — methane absorbs red light, which is why the ice giants are blue — and a structure: zonal bands for a body with a fluid envelope, because a rapidly rotating atmosphere organises into them, and fractal terrain for one with a solid surface. Polar caps grow and shrink with the derived temperature, which is the clearest visible consequence of the whole chain. The generator samples three-dimensional noise along the sphere rather than a flat field, so there is no seam to stitch at the antimeridian and no pinching at the poles, and it writes into a byte array rather than a canvas — a pure function, testable, with no 2D context to be unavailable. Two things the derivation cannot do, both stated on screen next to the measurements it rests on. Equilibrium temperature ignores greenhouse warming and internal heat, so Venus comes out at 300 K against a real surface of 737 K and Io, kept molten by tides, classifies as ice. And these are illustrations: reasoned, but not observations. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01WaySiNst4HhDXBHnMy8p5G
End-to-end tests (Playwright)
These tests run the real Angular dev server in a real Chromium browser, covering interactions
that unit/component tests (under src/**/*.spec.ts, run via npm test) can only approximate
under jsdom — most importantly the galaxy↔system camera-flight transitions (real WebGPU/
WebGL2 initialization + raycaster picking) and cross-view search navigation.
Running
npm run e2e # headless run against a freshly started dev server
npx playwright test --ui # interactive UI mode
npx playwright show-report
playwright.config.ts starts npm run start -- --port=4300 automatically and waits for it to
respond before running the suite (webServer.reuseExistingServer is true outside CI, so an
already-running ng serve on port 4300 is reused instead of starting a second one). Port 4300
is used instead of the Angular CLI's conventional 4200 to avoid colliding with an unrelated
server a developer might already have running there.
Notes
- The Sun (
Sol) is always placed at the coordinate-system origin (x=0,y=0,z=0), which is exactly where the default galaxy-view camera looks.camera-flight.spec.tsrelies on this to reliably click-select it by clicking the center of the canvas, without needing pixel-perfect knowledge of the star field's on-screen layout. - Data (bootstrap fetch of
stars.bin/stars-index.json/bodies.json/exoplanets.json/deepsky.json) loads asynchronously after the page loads, so tests poll (re-click/re-check) rather than assume the scene is interactive immediately afterpage.goto(). deepsky.jsonis the one dataset the scene treats as optional: it only feeds the decorative backdrop, so a failure to load it is logged and the star field comes up regardless.