Life & fun · alternatives · 2026
24 alternatives to SiderealLab
Find out how fast you are spinning from your latitude
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.
- 1
Measure the Earth rotation locally
2025 · apps.apple.com · 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 →
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EarthGuessr▲192I built it as a way to practice programming. There are probably much better alternatives out there.
2025 · earthguessr.com · its alternatives →
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22d ago · space.bl2.net · its alternatives →
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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 →
- 6IB
I built this because measuring my age in years felt boring—I wanted to see the kilometers. The first version only used Earth's orbital speed (~30km/s), but the number moved too slowly. To get the "existential dread" feeling, I switched to using the Milky Way's velocity relative to the CMB (~600km/s). The math takes some liberties (using scalar sum instead of vector) to make the speed feel "fast," but it gets the point across. Under the hood, it's a single HTML file with zero dependencies. No React, no build step. The main challenge was the canvas starfield—I had to pre-allocate the…
Jan 2026 · cosmic-odometer.vercel.app · its alternatives →
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Cosmic-Watch▲73The World’s first 3D astronomical clock & stunning skyguide
2020 · cosmic-watch.com · its alternatives →
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AstroAlert▲113Know exactly when satellites pass above you.
Nov 2025 · astroalert.app · its alternatives →
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Online Compass▲106Use an online compass to instantly find true north and live direction in seconds. Fast, no app needed - turn your phone into a real compass.
2024 · onlinecompass.io · 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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Satellite Tracking and Alignment Resource
2024 · star.conor.link · its alternatives →
- 17
This is a service I've built to provide equirectangular cloud maps of the whole Earth, updated every 3 hours, for free. It's based on infrared and visible light data from EUMETSAT, processed to enhance the clouds and try to reduce the impact of surface temperatures on the final image. I built it because it's surprisingly hard to find these kinds of images in a format that's useful to developers and hobbyists. I was building a 3D ISS tracker and wanted to include live clouds but couldn't find anything good, so I got sidetracked, and here we are.
2023 · github.com · its alternatives →
- 18
A little while ago I built a tool to calculate how far you've traveled through space since the exact second you were born. The math was relatively simple (Earth's spin + Solar orbit + Galactic drift), but the feedback I got here inspired me to rewrite the visual engine and turn it into a proper deep-space dashboard. Here is what’s new under the hood: 1. Vanilla JS 3D Engine: I built a custom Three.js simulation that renders your exact orbital alignment on your birth date and tracks it to the present. 2. Live Telemetry: It now actively tracks the real-time Keplerian orbital positions of…
Feb 2026 · cosmicodometer.space · its alternatives →
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GeoSprinter▲12Race against the clock to spot locations from the sky 🚀
2025 · geosprinter.com · its alternatives →
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Explore global cities that share your exact latitude
May 2026 · mylatitude.net · its alternatives →
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Measure Your Speed in Real Time
Jun 2026 · livespeedometer.net · its alternatives →
- 24
Interactive 3D planet engine for earth science.
Jul 2026 · play.google.com · its alternatives →
Also compare
- SiderealLab iOS Distributed NOW alternatives
- Atlas of Space alternatives
- EarthGuessr alternatives
- The whole Solar System and every tracked satellite, live in the browser alternatives
- Beautiful 3D ISS tracker with live video and near-realtime clouds alternatives
- I built a space travel calculator using Vanilla JavaScript 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 →