Life & fun · alternatives · 2026
24 alternatives to A solar system simulation in the browser
I didn't realize Universe Sandbox ran on MacOS, and I was in the mood to play around a bit. Some functions it's got: - Random system generation - Sonification is super fun too - Habitability Simulation (Just for fun, don't cite this please) - Replacing, spawning, deleting objects I've had tons of fun building this, so I hope someone else can share the joy. It's free and runs in the browser. I'd love to hear any feedback. I think this is at a state where I might leave it as it is, but if people are interested in other features, maybe I'll keep working on it. I've kept saying I'll stop working…
This browser-based solar system simulation lets users generate, explore, and manipulate virtual star systems. Features include random system generation, object creation and deletion, habitability simulation, and… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier.
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Took a break from the falling sand simulation blog posts this week to work on another small project. It's a little pixel world generator- each time you visit, you'll see a new little world. I really like this stuff and had a blast building it yesterday!
2022 · jason.today · its alternatives →
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Atlas of Spacefree▲770Hello HN! Sharing a recent side project of mine, the Atlas of Space, that I built out to explore the Solar System. As a long-time space nerd, I realized recently that I didn't have a good intuition on the scale, speed, and relative orientation of the celestial bodies around us. So over the break I built out a kind of spatial Wikipedia to click around and learn about planets, moons, asteroids, and other bodies orbiting the Sun. The physics is all simulated in the browser using simple Newtonian mechanics. There's a lot left to do from here, including modeling objects in non-Keplerian orbits…
2025 · atlasof.space · its alternatives →
- 3AS
I was inspired to make a web based ants simulator after watching this video https://www.youtube.com/watch?v=81GQNPJip2Y Any feedback appreciated. Best viewed on Chromium based browsers. Firefox is slow for some reason and Safari is not tested as I don't have a Mac.
2022 · ants-sandbox.io · its alternatives →
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A browser based, retro sandbox game that let
2021 · simulator.money · its alternatives →
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Create & destroy on an unimaginable scale
2015 · universesandbox.com · its alternatives →
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PixelSpace▲68A tediously accurate scale model of the solar system
2014 · joshworth.com · its alternatives →
- 7AS
I really like the look of the famous album art for Unknown Pleasures [1]. It was originally created by Harold Craft at the Arecibo Observatory from the signals of the first discovered radio pulsar [2]. I made a spectrogram that produces a similar look. It runs FFT in Rust and visualizes it with WebGL. [1]: https://en.wikipedia.org/wiki/File:UnknownPleasuresVinyl.jpg [2]: https://en.wikipedia.org/wiki/PSR_B1919%2B21
2024 · aestuans.github.io · its alternatives →
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Hello, I am the creator and maintainer of Stellarium Mobile. I have been working in my free time for about a year on this new project Galaxium, that is more about traveling in the universe rather than looking at the sky from Earth. It is still experimental, and at the moment I am not sure what it will become. Feedback is welcome.
Aug 2026 · galaxium.app · its alternatives →
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The open world (galaxy?) version of a really great iOS game!
2015 · store.steampowered.com · its alternatives →
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Explore the universe directly in your browser
2025 · universesim.vercel.app · its alternatives →
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Spatium▲182Hi there, humans! I'm excited to announce Spatium! I'm a big fan of any topic related to our universe. I'm also a developer, so I've put these things together and I built this new tab Chrome Extension for space lovers, astronomy fans, and science geeks like me. If you enjoyed it, please spread some love <3 FEATURES • Space images • Every day, get a fascinating image of our universe. Enjoy pictures of stars, planets, moons, galaxies, nebulae, comets and more right on your browser tab. • Sun Widget • Find out when the sunrise, sunset, first and last light times will be precisely at your…
2021 · spatium.earth · its alternatives →
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This is an web audio experiment I've been wanting to do for a long time. Basically an ambient music composition, but all the sound elements are laid out in space, and that musical space can be explored freely. It's definitely inspired by in-world music that sometimes appears in games. I basically took that concept, keeping the music aspect, and dropping the entire "game" aspect. I also turned it into a more "traditional" non-interactive album, but since I started with code, why not program the whole thing? Had a blast making the entire album from code, the complete source for the album is…
2024 · ambient.garden · its alternatives →
- 13IM
I made this site using R3F (https://github.com/pmndrs/react-three-fiber), a React renderer for 3JS (https://threejs.org/). The celestial bodies are Three.JS meshes. I used loaders (namely 'useLoader' from R3F and 'GLTFLoader' from 3JS) to import 3D models, such as International Space Station. More on loading models in R3F: https://docs.pmnd.rs/react-three-fiber/tutorials/loading-mod... I've future plans for this side project. It would be great to hear from the HN community before diving into them. Enjoy! P.S: Getting an empty…
2022 · spaceinbrowser.com · its alternatives →
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AstroGrid▲113Explore the entire universe in your browser, in real 3D
Apr 2026 · velonspace.com · its alternatives →
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SpaceSim▲7Explore a free 3D space simulator in your browser. Travel across the Solar System, change time, inspect source-backed worlds, and collect postcards.
Jul 2026 · spacesim.co · its alternatives →
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Craft or destroy amazing worlds with your godly touch!
2016 · thesandbox2.com · its alternatives →
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I built StellarSnap as a calm, ad-free space to explore NASA’s Astronomy Picture of the Day (APOD) and learn astronomy along the way. What it includes: - A clean APOD archive browser with a Random APOD button - A growing Glossary with term highlighting across the site - A 2D Orbit Simulator where you can test satellite motion with real physics - A deeper Encyclopedia, still early, but expanding - Subtle touches like “see past APODs using this term” - And more to come It’s entirely ad-free, cookie-free, and not affiliated with NASA, but I was honored to have StellarSnap mentioned on the…
2025 · stellarsnap.space · its alternatives →
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Hello HN: I love the randomness of the universe. I've been spending some time creating a Craps simulator to help experience this love without having to shell out like a real degenerate. For others similarly fascinated: I would love to hear any and all feedback you've got on this. It's meant to be unique in the sense that it's a community-oriented, infinite simulation.
Feb 2026 · infinitecraps.com · its alternatives →
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Hey HN, Like many of you, I'm tired of public AI leaderboards that mostly recycle the same saturated/overfitted benchmarks (MMLU, HumanEval, etc.) and often miss fast/cheap variants or real daily pain points. A couple days ago I launched AIBenchy — a small, opinionated leaderboard running my own custom tests focused on end-user/dev scenarios that actually trip up models today. Current tests cover categories like: - Anti-AI Tricks (classic gotchas like "count the Rs in strawberry", logic traps) - Instruction following & consistency - Data parsing/extraction -…
Jun 2026 · aibenchy.com · its alternatives →
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Hi HN! I’ve spent the summer of the past 2 years building The Atlas, a procedural universe simulator that generates 1 sextillion galaxies (10²¹) from a single mathematical seed. Think No Man’s Sky meets theoretical physics, but running entirely in your browser. Everything is purely deterministic, the universe is calculated from SHA-256 hashed seeds using the golden ratio as primordial constant. There’s no database, no pre-saved data, just pure math. Time itself is treated as a coordinate, so the universe exists as a 4D structure where any moment can be computed on demand. Shut it down for…
2025 · github.com · its alternatives →
- 24IB
Mar 2026 · structuredlabs.github.io · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →