AI · alternatives · 2026
24 alternatives to CosmoTime — Learn Space & Astronomy
Your personal gateway to understanding the universe
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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Explore the wonders of our solar system!
2024 · apps.apple.com · its alternatives →
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A 3D universe explorer & astronomy app, in your browser
Jun 2026 · space.pointdynamics.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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Cosmic-Watch▲73The World’s first 3D astronomical clock & stunning skyguide
2020 · cosmic-watch.com · its alternatives →
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- 8GI
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 →
- 9AAAstro App▲291
I really like Stellarium and SkySafari but I felt like these are primarily geared towards exploring the sky but not so much "here are the long list of things I want to see, when can I see them tonight and where". There's also not really a great option I've found that combines sky object planning + location weather details while still being free so I built this. The UI's heavily inspired by NINAs sky atlas + Robinhood. Right now you can: View the altitude chart of objects and 3D view Create lists of objects of interest View the annual max/min daily altitude of an object to find the best…
2024 · astro.sshh.io · its alternatives →
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An interactive visualization of the universe
2019 · neal.fun · its alternatives →
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Cosmos ▲66Cosmos is one of the bestselling science books of all time
2015 · amazon.com · 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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~spaces~ V2▲64virtual universe w/ you can create worlds and meet friends
2021 · apps.apple.com · its alternatives →
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Explore the universe directly in your browser
2025 · universesim.vercel.app · its alternatives →
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Cosmos▲57Solve puzzles and explore new worlds on your voyage
2016 · apps.apple.com · its alternatives →
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Travel through galaxies into deep space
2016 · apps.apple.com · its alternatives →
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Explore the cosmos and uncover the mysteries of the universe
2024 · kickstarter.com · its alternatives →
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Free course on how the world works from the YouTube star.
2015 · its alternatives →
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Bringing ‘A Brief History of Time’ to a whole new generation
2016 · apps.apple.com · its alternatives →
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Interactive 3D space science for curious little minds
Sep 2026 · ninaslittleuniverse.com · 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 →