Guarding the Gilded Age

This is my first scene for my first model in C4D. The ship, the "Silver Sword" is the same mesh as my earlier "Sword of Liberty", put in a stylized scene with a new paint scheme. The ship is mine. The golden Earth is based on an old tutorial online for building an Earth for C4D v8.0, uses a NASA composite photo for the surface of the earth, shifted to yellow, and then messed upon by me. The illustrated sky is a cylinder with an old-tyme diagram of the heavens. As I said, open sources.

I welcome and encourage any constructive criticism you can make on the model, mesh(es), or scene. I look at some of Coolhand's amazing work and I see depth and immensity. I look at this and get a sense of flatness and a lack of realism. Help!