I have a question. Is this mod still being developed? There are so many planets and moons now. Is it possible to add them in the settings? While other developers haven't released alternative planet images for the new planets and moons yet, perhaps some will be added if they're already changeable in your settings.

Hello SimbaBay,
If there is request for different planets, and if it's not much work, it can be added by me. I think Maraxis and Tenebris were added last year, like those, new ones are welcome.
Also, this project is open source. You are free to send in a pull request for new planets, I'll merge and publish.
Finally, you can fork freely.
Hope that clears up (:
Best,
Cagri.

Thank you for your reply.
I will gladly do so. There are now so many beautiful planets and moons here on the mod portal that I hope one or two graphic designers might be persuaded to develop new planet images for these as well.