Since the night on the moon is 13 days, I was thinking you add a cryo-chamber mod that lets you use an energy crystal and let you sleep for those 13 days.. I know a guy that has a mod like this but it is for 1.5.2. He made just for this mod and will gladly help intergrate it to galacticraft. A streamer named Giantwaffle on Twitch is streaming your mod and is constantly on the moon and the guy got the idea from there and he helped a lot of people. Here is his mod https://github.com/Renari/Cryochamber