Life & fun · alternatives · 2026
24 alternatives to SpaceTrekk
Explore the solar system in real-time 3D with actual physics
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 2 we have checked on their own sites, 2 of them free or with a free tier.
- 1
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 →
- 2
AstroGrid▲113Explore the entire universe in your browser, in real 3D
Apr 2026 · velonspace.com · its alternatives →
- 3GI
Just for fun and self education, I've built this over a weekend to teach myself why orbits exist, not just show planets going around. Something that was never clearly explain to me in school. It opens with a guided tour that builds the idea up step by step: two bodies and the equal/opposite force, inertia (the Sun is removed and Earth just drifts straight), then "an orbit is falling and continuously missing," cosmic velocities with a little rocket, Voyager 1 & 2's real gravity assists (the clock runs the actual 1977–1989 dates so the planets orbit into their grand-tour alignment and the…
Jun 2026 · qunabu.github.io · its alternatives →
- 4
24d ago · space.bl2.net · its alternatives →
- 5
AstraPixelsfree tier, from $5/mo▲267A pixel-art solar system at its real current positions.
Aug 2026 · astrapixels.com · its alternatives →
- 6
This is a little hobby project that I hope you enjoy. You can see where the International Space Station is now, with live HD video from NASA, on a realistic 3D globe. The positions of the sun and moon are also accurate, though distances aren't to scale. The clouds are also near-realtime; I span that out into a separate project at https://clouds.matteason.co.uk, where the cloud images I create from EUMETSAT data are freely available. I've got more features almost ready to go, like the ability to turn off all UI, toggleable clouds and turning off the day/night cycle I'd love for…
2024 · iss.matteason.co.uk · its alternatives →
- 7
- 8SP
2014 · stefanom.org · its alternatives →
- 9
PixelSpace▲68A tediously accurate scale model of the solar system
2014 · joshworth.com · its alternatives →
- 10
Gravity WebGL experiment in the Solar System
2016 · github.com · its alternatives →
- 11
3D simulator that models planets, orbits, propulsion systems
Nov 2025 · solar.chriswest.tech · its alternatives →
- 12
A real-time, ultra-realistic 3D solar system in your pocket
Jul 2026 · play.google.com · its alternatives →
- 13
Features include: - Several preset periodic orbits: the classic Figure-8, plus newly discovered 3D solutions from Li and Liao's recent database of 10,000+ orbits (https://arxiv.org/html/2508.08568v1) - Full 3D camera controls (rotate/pan/zoom) with body-following mode - Force and velocity vector visualization - Timeline scrubbing to explore the full orbital period The 3D presets are particularly interesting. Try "O₂(1.2)" or "Piano O₆(0.6)" from the Load Presets menu to see configurations where bodies weave in and out of the orbital plane. Most browser…
Nov 2025 · trisolarchaos.com · its alternatives →
- 14
- 15
- 16HO
3D gravity and space Simulator. Explore and play around with the force of gravity in the context of an array of scenarios from our solar system and beyond. You can add planets, delete the Sun, change the value of the gravitational constant or simply lean back and enjoy the dazzling beauty of the pen
2018 · thehappykoala.github.io · its alternatives →
- 17
I (17y/o) have been developing a rocket launch simulation that allows the user to explore what it's like launching a rocket from earth and putting it into orbit. This idea originally started as an educational simulation but as i've gone more down the rabbit hole the more i've wanted to make it realistic. The problem is that I've never had a formal orbital mechanics class or anything like that so I don't know what I'm missing, what I currently have implemented is: Variable gravity Variable Atmospheric drag (US Standard Atmosphere 1976) Multi-stage rockets Closed-loop guidance /…
Jan 2026 · donutthejedi.com · its alternatives →
- 18
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 →
- 19
Fully automated SpaceX ISS Dragon docking simulator system. - danirukun/spacex-iss-docking-sim-autopilot
2020 · github.com · its alternatives →
- 20
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 →
- 21IM
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 →
- 22
3D visualization of NASA meteor shower data. Scientifically accurate and fully interactive.
2015 · ianww.com · its alternatives →
- 23
- 24
8Planets▲66A simple viewer for planetary orbits in our Solar System
2021 · 8planets.app · its alternatives →
Also compare
- Atlas of Space alternatives
- AstroGrid alternatives
- Gravity – Interactive solar-system simulator, from Newton to Einstein alternatives
- The whole Solar System and every tracked satellite, live in the browser alternatives
- AstraPixels alternatives
- Beautiful 3D ISS tracker with live video and near-realtime clouds alternatives
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 →