Life & fun · alternatives · 2026
24 alternatives to Relativity of Space
Unveil the hidden beauty of the solar system.
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. Relativity of Space launched in 2017; newer entries below may have overtaken it.
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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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PixelSpace▲68A tediously accurate scale model of the solar system
2014 · joshworth.com · its alternatives →
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28d ago · space.bl2.net · its alternatives →
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A lively presentation of the theory of relativity.
2016 · amazon.com · its alternatives →
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AstraPixelsfree tier, from $5/mo▲267A pixel-art solar system at its real current positions.
Aug 2026 · astrapixels.com · its alternatives →
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Google Translate for engineers working with motion
2017 · google.github.io · its alternatives →
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You can be an architect of the future
2016 · jpl.nasa.gov · its alternatives →
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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 →
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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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A short and sweet textbook on Einstein’s theory of relativity
2021 · ramp-book.com · its alternatives →
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Space Age▲137A wonderful, kooky, and mysterious space adventure
2014 · spaceageapp.com · its alternatives →
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_PRISM▲86A visually stunning journey through a microcosmic galaxy
2016 · apps.apple.com · 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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Galaxy VR▲77A fully immersive VR space simulator experience
2015 · play.google.com · its alternatives →
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SOLAR by Aireal ▲88Walk among the planets via geospatial augmented reality
2016 · aireal.io · its alternatives →
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Better client for the Astronomy Picture of the Day (APOD)
2016 · its alternatives →
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Eclipse 2017▲110NASA's interactive eclipse path for your location
2017 · science.nasa.gov · 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 →