I'd love to help make the stellarium.org site responsive. Nice docs for your Jekyll site set up.[0] I'll dig into the files to grok your workflow and submit a PR for something small at first to get your feedback, say maybe the post pages.

my github username === my hn username

Cheers! And thanks for your team's work!

[0] https://github.com/Stellarium/stellarium.github.io/blob/mast...