[OC] Kosmische Netzstruktur über ~2M Galaxien (SDSS + GLADE + 2MRS)

Live: [https://skymap.rulkens.com](https://skymap.rulkens.com)
Try it! It’s quite some data to download (about 200MB for the medium data set), but once it’s loaded you can move in full 3D.

Source data:
– SDSS DR18 — ~500k galaxies, [https://skyserver.sdss.org/dr18](https://skyserver.sdss.org/dr18)
– GLADE v2.3 — ~2M galaxies after cross-match dedup
(an all-sky galaxy catalog; original ~3.3M rows)
– 2MRS — ~45k local-volume galaxies, [https://tdc-www.harvard.edu/2mass/](https://tdc-www.harvard.edu/2mass/)

Cross-matched and rendered as instanced points in the browser using
WebGPU. Once you zoom in you can see galaxy discs and thumbnails pulled from SDSS sky server.

Tools: TypeScript + React for the UI, raw WebGPU + WGSL shaders for
the renderer, custom 64-byte-per-point binary format for the catalog
files. Built last weekend in 4 days with Claude Code.

Live (Chrome / Edge 113+, Firefox 141+, Safari 26+):
[https://skymap.rulkens.com](https://skymap.rulkens.com)
Source (MIT):
[https://github.com/rulkens/skymap](https://github.com/rulkens/skymap)
DOI: [https://doi.org/10.5281/zenodo.20037028](https://doi.org/10.5281/zenodo.20037028)

Really curious what I can learn from this sub. Happy to answer
questions about the data or the rendering.

I swear to god if we just exist in some guy’s neurons, I am going to be so pissed. 

Incredible, I loved exploring it.

whoa this is actually insane looking, kinda looks like brain neurons or something lol 🤯

Thought this was central London