I built a space travel calculator using Vanilla JavaScript

Show HN: I built a space travel calculator using Vanilla JavaScript

I built a space travel calculator using Vanilla JavaScript is a business in show hn launch.

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I built this because measuring my age in years felt boring—I wanted to see the kilometers.The first version only used Earth's orbital speed (~30km/s), but the number moved too slowly. To get the "existential dread" feeling, I switched to using the Milky Way's velocity relative to the CMB (~600km/s). The math takes some liberties (using scalar sum instead of vector) to make the speed feel "fast," but it gets the point across.Under the hood, it's a single HTML file with zero dependencies. No React, no build step. The main challenge was the canvas starfield—I had to pre-allocate the star objects to stop the garbage collector from causing stutters on mobile.Let me know if the physics makes you a

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Website: cosmic-odometer.vercel.app