Attribution

Image source is https://commons.wikimedia.org/wiki/File:Milky_way_stargate_with_very_detailed_glyphs2.svg

Author: Max Willis + User:M.A.D.company for correction of the rotation glyphs License: GNU FDL 1.2+

Maybe useful stuff?

This looks like overkill: https://github.com/awebneck/savage/