Good job. Some looked better than others. Disclaimer I'm not a VFX artist but here are my thoughts.
On the Rocket taking off it was composited well as far as matching perspective but what would make it look more real is the lighting. It didn't seem to match the environment, also it looked to clear to the rest of the image, maybe add a texture or grain.
I like the astronaut, it looked good. Couple things that would make it look better is a little movement and be able to see a face under the mask. I'm referencing 1:36 in the video.