Very nice. This captures the feeling that I had in Halo CE where I wandered the new and exciting forerunner world. Halo 4 is a lot like it, a new unique environment.
the ship isn't supposed to be detailed because its far away and has a very hard shadow sparth is an example of just using silhouette's to convey an object, just to exaggerate the sense of scale
This is pretty good, if I may - you might want to make sure a detailed object (the ship) isn't behind one that isn't (the building) - otherwise, good job!