A gravity simulator where forces propagate at the speed of light
Details
- External ID
- 49553092
- Source
- HN
- Company
- —
- Product
- A gravity simulator where forces propagate at the speed of light
- Website domain
- github.com
- Launched
- Sept. 3, 2026
- Cohort
- —
- Upvotes
- 6
- Upvotes percentile
- 0.32854864433811803
- Tags
- —
- Fetched at
- Sept. 10, 2026, 5:31 a.m.
- Updated at
- Sept. 10, 2026, 5:31 a.m.
Enrichment
- Theme
- 3D graphics and physics simulation tools
- Vertical
- Horizontal
- Function
- Hardware & robotics
- Audience
- B2C
- AI stance
- Not AI
- Project type
- Hobby / open-source project
- Normalized one-liner
- gravity simulator with relativistic physics
- Manually corrected
- False
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 — 241 launches clear the similarity bar, closest 8 shown.
Attention rank: #153 of 242 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 299 days after the earliest competitor.
- rethink-lio-gravity · github · 2026-09-11 · 16 upvotes · similarity 0.56
- Gravity · hn · 2026-06-09 · 217 upvotes · similarity 0.56
- An interactive physics simulator with 1000’s of balls, in your terminal · hn · 2026-01-19 · 75 upvotes · similarity 0.56
- Inertia, Physics in a Terminal · hn · 2026-07-19 · 5 upvotes · similarity 0.52
- What if the speed of light was 5 km/h? · hn · 2026-09-10 · 626 upvotes · similarity 0.52
- General Astronautics — Robots for Space · yc · 2026-02-26 · 15 upvotes · similarity 0.51
- Simulating the vacuum as a superfluid to derive Alpha = 1/137 · hn · 2025-11-24 · 5 upvotes · similarity 0.50
- Applied Electrodynamics: A new kind of camera that can see through walls · yc · 2026-07-30 · 24 upvotes · similarity 0.49
Other launches for this product
- No other launches for this product.
Same idea, different domain
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