Hey there Micdoodle8, I wonder if you can add the planet Mercury and Mars's moons to the Galacticraft Mod 
Adding New Dimesions
- Thread starter InfinitySwordofDiamond
- Start date
You need to use the Extra Planets Mod. It's got what your looking for:
- Mercury
- Venus (1.7.10 only! Due to GC have added Venus in 1.8.9/1.10.2/1.11.2/1.12.2 versions!)
- Ceres
- Jupiter
- Saturn
- Uranus
- Neptune
- Pluto
- Eris
- Kepler 22b