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Show HN: Rocket Launch and Orbit Simulator

2026-01-09 @ 19:15:21Points: 13Comments: 9

  Variable gravity
  Variable Atmospheric drag (US Standard Atmosphere 1976)
  Multi-stage rockets
  Closed-loop guidance / pitch programs (works well within ranges 350km to 600km)
  Orbital prediction and thrusting options to change your orbit.
The feedback I'm looking for is: UI improvements and possible future physics implementations that I can work on.

Current code and physics can be found at: https://github.com/donutTheJedi/Rocket-Launch-Simulation

Show HN: EuConform – Offline-first EU AI Act compliance tool (open source)

2026-01-09 @ 19:11:57Points: 13Comments: 3

The core idea is local-first compliance: – risk classification (Articles 5–15, incl. prohibited use cases) – bias evaluation using CrowS-Pairs – automatic Annex IV–oriented PDF reports – no cloud services or external APIs (browser-based + Ollama)

I’m especially interested in feedback on whether this kind of technical framing of AI regulation makes sense in real-world projects.

JavaScript Demos in 140 Characters

2026-01-09 @ 18:48:30Points: 38Comments: 9

Exercise can be nearly as effective as therapy for depression

2026-01-09 @ 18:29:35Points: 42Comments: 13

Show HN: Scroll Wikipedia like TikTok

2026-01-09 @ 18:15:16Points: 68Comments: 11

Every post on the feed( on slop/duck/storytime) you see is streamed and generated just-in-time with HTML and into a Canvas with Gemini 3 Flash.

Comments and DMs are bidirectionally linked with a Cloudflare Workers Durable Object which is why they feel so fast. Every generated post is saved into a DO SQLite which is then served into the "Following" feed so it can be served quicker.

This was inspired by Wikitok, a VSCode Extension I made around brainrot, and another fully generative UI site I made.

Replit (YC W18) Is Hiring

2026-01-09 @ 18:00:56Points: 1

Show HN: I made a memory game to teach you to play piano by ear

2026-01-09 @ 17:17:28Points: 176Comments: 54

The Vietnam government has banned rooted phones from using any banking app

2026-01-09 @ 17:00:11Points: 278Comments: 329

Cloudflare CEO on the Italy fines

2026-01-09 @ 16:46:48Points: 198Comments: 282

Latest SteamOS Beta Now Includes Ntsync Kernel Driver

2026-01-09 @ 16:27:19Points: 62Comments: 17

Cloudspecs: Cloud Hardware Evolution Through the Looking Glass

2026-01-09 @ 16:23:44Points: 28Comments: 7

How to store a chess position in 26 bytes (2022)

2026-01-09 @ 15:07:17Points: 45Comments: 29

London–Calcutta Bus Service

2026-01-09 @ 14:50:48Points: 275Comments: 141

Kagi releases alpha version of Orion for Linux

2026-01-09 @ 12:54:48Points: 290Comments: 217

Mathematics for Computer Science (2018) [pdf]

2026-01-09 @ 07:06:41Points: 332Comments: 57

Agonist-Antagonist Myoneural Interface

2026-01-09 @ 05:44:58Points: 15Comments: 0

Show HN: Various shape regularization algorithms

2026-01-09 @ 02:13:01Points: 12Comments: 1

That kind of led me to shape regularization. CGAL had implemented a few methods for that, but there are more ways to do it, which I thought were nice. Also I typically work in Python, so it was nice to have a pure Python library could handle this. I struggled to get the first version working as a QP. At a high level most of these boil down to minimizing a cost A + B where A is the cost associated the geometry and goes up the more you move it, and B is the cost associated "niceness" or rather the constraints you impose, and goes down the more you impose them. Then you try and minimize A + B or rather HA + (1-H)B where H is a hyper-parameter that controls the relative importance of A and B.

Shape regularization is a technique used in computational geometry to clean up noisy or imprecise geometric data by aligning segments to common orientations and adjusting their positions to create cleaner, more regular shapes.

I needed a Python implementation so started with the examples implemented in CGAL then added a couple more for snap and joint regularization and metric regularization.

Scientists discover oldest poison, on 60k-year-old arrows

2026-01-08 @ 23:24:30Points: 32Comments: 2

Embassy: Modern embedded framework, using Rust and async

2026-01-08 @ 23:00:45Points: 298Comments: 133

Sopro TTS: A 169M model with zero-shot voice cloning that runs on the CPU

2026-01-08 @ 20:37:07Points: 332Comments: 116

How to Code Claude Code in 200 Lines of Code

2026-01-08 @ 19:54:26Points: 677Comments: 212

Bose has released API docs and opened the API for its EoL SoundTouch speakers

2026-01-08 @ 15:07:57Points: 2476Comments: 379

CI-Hush

2026-01-07 @ 09:57:33Points: 8Comments: 0

Show HN: Similarity = cosine(your_GitHub_stars, Karpathy) Client-side

2026-01-06 @ 13:23:39Points: 58Comments: 25

GitHub profile analysis - Build your embedding from your Stars - Compare and discover popular people with similar interests and share yours - Generate a Skill Radar - Recommend repositories you might like

Sorted string tables (SST) from first principles

2026-01-05 @ 22:41:33Points: 50Comments: 4

When Kitty Litter Caused a Nuclear Catastrophe

2026-01-04 @ 22:47:53Points: 105Comments: 56

The (likely?) cheapest home-made Michelson interferometer

2026-01-04 @ 20:49:19Points: 16Comments: 2

How Will the Miracle Happen Today?

2026-01-04 @ 16:32:13Points: 216Comments: 156

Hacking a Casio F-91W digital watch (2023)

2026-01-04 @ 16:05:08Points: 197Comments: 56

Linux Runs on Raspberry Pi RP2350's Hazard3 RISC-V Cores (2024)

2026-01-03 @ 16:34:38Points: 123Comments: 44

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