This is my very own OS that can be run in the web!
Interactive Earth–Moon physics laboratory for study. True-scale Newtonian two-body gravity with live sliders for G, masses, radii, distance, and orbital speed. Features solar/lunar eclipses with umbra–penumbra cones, Kepler metrics (period, eccentricity, areal velocity, Roche limit), and a cinematic Moon–Earth collision mode with debris and camera work. Built with Vite, React, TypeScript, and Three.js. Deployed on Vercel.