I’d be happy to provide input. I believe I have Discourse set up to ping me whenever there is a post in the Astro/Space category, but feel free to also ping me directly either here or on the Slack (or Gitter). If I get a chance, I’ll put any thoughts I have on the Github issue.
As for JuliaSpace, I think that is a good idea, except that JuliaAstrodynamics already exists, and I’m worried about duplication/ambiguity/other problems associated with having two different organizations associated with the same subtopic. Maybe @helgee has some thoughts about this (I believe he started JuliaAstrodynamics).