Celestiary

<img src="screens/ss-Dec-5-2020.png" width="400" style="float: right;"/>

A celestial simulator inspired by Celestia (http://shatters.net/celestia), written in JS/three.js/GLSL.

A running instance of Celestiary is available at:

https://celestiary.github.io/

Features

• 9 planets, 20 moons. Accurate major planet orbits
• 106,747 stars, 5,672 names
• 89 constellations
• Time controls for rate and direction of time
• Kinda works on mobile! :)

See open issues page for upcoming features.

Development

yarn install
yarn test
yarn serve
# Visit http://localhost:8080/

Edits in the source directory will be available in the app on a page refresh.

For larger changes, it's also a good idea to step through the guide pages (in /guide) to make sure they'll all working.

Deploy

The app runs at https://celestiary.github.io/ and is in the celestiary.github.io repo. From it grab the changes from the web repo and then push them:

git pull upstream master
git push

Performance

A first-time session downloads ~3-5MB, mostly of the stars data. Planet textures are lazy-fetched as the user moves around the scene, but will bring that upwards to ~10MB in full.

Everything is highly cacheable, so subsequent visits are brief HEAD checks on root resources.

Warm load on a local server is 260B in ~300ms (mostly cache checking). Page rendering finishes by 1s.