3 apps

Science & Engineering

Near-Earth asteroids, cosmic rays, and what a dirty hull costs.

About this shelf

Three small instruments built on public data and published physics. Each takes one phenomenon and puts it on a phone: the asteroids passing close to Earth in the next hundred years, the muons from cosmic rays hitting your screen right now, and the fuel a ship burns because of the growth on its hull.

For people who watch the sky, count particles, or keep ships efficient.

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Last updated: 18 October 2026