The moon does feel a little bit small, is it easy for you to increase it's size? It should be the same size as the Sun.

I'd also make some config option for that.

It works! Thanks so much for adding this feature!

Reopening for minor issue with the moon. It gets smaller and disappears when you look directly at it.
http://imgur.com/a/lnrfh

Sorry, that one is bug separated with this suggestion.
Please open new issue for that.