BurgerMan12

It appears that you are using Real Solar System as well as Astronomer's Visual Pack. AVP only supports stock system, so you have two options: A) You can switch to other visual pack such as Real Visual Enchancements. B) You can manually edit the configs for the planets located in GameData/AstronomersVisualPack/AVP_Configs/Stock for them to feature Earth, Venus and others, but that can get a bit tricky.