A gravity simulator where forces propagate at the speed of light
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HN · launched Sep 3, 2026 · 6 upvotes (top 67%) · 0 views
Niche: physics and engineering simulation software · 104 launches, 8 in the last 7 days ▲ +14% · Explore this niche →
Category and tags
- Horizontal
- Hardware & robotics
- B2C
- Not AI
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 104 launches in physics and engineering simulation software →
Could you build this?
Partial A basic visual N-body simulator is easy to prompt, but solving retarded potentials and delayed differential equations for light-speed gravity propagation while maintaining numerical stability requires advanced physics/computational mathematics.
What it would actually take: Implemented in WebGL/WebGPU or C++/Rust with WebAssembly, the engine must track historical particle trajectories in spatial-temporal buffers rather than computing instantaneous Newtonian gravity. The physics engine requires solving retarded gravitational force equations via interpolation across past light cones with adaptive time-stepping (Runge-Kutta) to avoid unphysical runaway orbits. Numerical simulation expertise and GPU compute pipeline optimization are essential.
Discussion
No comments on this launch.
Competitors
Other products that read as similar to this one : 573 launches clear the similarity bar, closest 8 shown.
Attention rank: #389 of 574 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 303 days after the earliest competitor.
- rethink-lio-gravity · github · 2026-09-11 · 16 upvotes · similarity 0.57
- An interactive physics simulator with 1000’s of balls, in your terminal · hn · 2026-01-19 · 75 upvotes · similarity 0.57
- Gravity · hn · 2026-06-09 · 217 upvotes · similarity 0.56
- Inertia, Physics in a Terminal · hn · 2026-07-19 · 5 upvotes · similarity 0.53
- PhysStudio · github · 2026-10-30 · 24 upvotes · similarity 0.53
- everything-everywhere-for-antigravity · github · 2026-10-02 · 34 upvotes · similarity 0.52
- What if the speed of light was 5 km/h? · hn · 2026-09-10 · 626 upvotes · similarity 0.52
- steel · github · 2026-11-09 · 194 upvotes · similarity 0.52
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