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. Relativity of Space launched in 2017; newer entries below may have overtaken it.

1AO
Atlas of Space▲770
Hello 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
PixelSpace▲68
A tediously accurate scale model of the solar system
2014 · its alternatives →
3
What is Relativity?▲57
A lively presentation of the theory of relativity.
2016 · its alternatives →
4
AstraPixels▲267
A pixel-art solar system at its real current positions.
Aug 2026 · astrapixels.com · its alternatives →
5
Explain Space▲5
Common outer space phenomena, beautifully explained.
2016 · its alternatives →
6
Inspector Spacetime from Google▲207
Google Translate for engineers working with motion
2017 · its alternatives →
7
Spacetime▲166
Be the first to know about space launches
2020 · its alternatives →
8
Visions of the Future (by NASA)▲160
You can be an architect of the future
2016 · its alternatives →
9GI
Gravity – Interactive solar-system simulator, from Newton to Einstein▲217
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 →
10RA
Relativity: A Modern Primer▲204
A short and sweet textbook on Einstein’s theory of relativity
2021 · ramp-book.com · its alternatives →
11
Space Age▲137
A wonderful, kooky, and mysterious space adventure
2014 · its alternatives →
12
Spacetime 2.0▲174
A home for all space lovers.
2020 · its alternatives →
13
World View▲66
Voyage to the edge of space.
2014 · its alternatives →
14
Planet Explorer▲150
Interactive global satellite images
2017 · its alternatives →
15
Spatium▲182
A space odyssey awaits you with beautiful space images
2021 · its alternatives →
16
Solar System Explorer▲80
Walk in the cosmos
2021 · its alternatives →
17
Stephen Hawking's Pocket Universe▲91
Bringing ‘A Brief History of Time’ to a whole new generation
2016 · its alternatives →
18
SOLAR by Aireal ▲88
Walk among the planets via geospatial augmented reality
2016 · its alternatives →
19
SpaceExperience.club▲6
Better client for the Astronomy Picture of the Day (APOD)
2016 · its alternatives →
20
Eclipse 2017▲110
NASA's interactive eclipse path for your location
2017 · its alternatives →
21
The Minute Physics Course▲99
Free course on how the world works from the YouTube star.
2015 · its alternatives →
22
gravity.js - Beta▲112
Gravity WebGL experiment in the Solar System
2016 · its alternatives →
23
Orbit▲83
Fun, flexible, visual time tracking.
2018 · its alternatives →
24
Totality▲79
When, where, and what you’ll see on Eclipse Day 2017
2017 · 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 →