Idea is nice but composition is a bit off with the sun/moon in the center of the image. I would have choosen to place it more to the left of the image. Also the subject is out of focus probably because of camera shake caused by a slower shutterspeed.
To resolve the out of focus you could increase your ISO value until a reasonable shutter speed is possible. Rule of thumb is about 1/(1.5 * focal length). Also some support for the camera helps in these situations.
Thanks for looking, and taking the time to comment. I agree with what you say on the composition, I briefly thought about just moving it in photoshop but I think there is just to much else wrong to make it worth it. By the way it is a moon, just another thing I was unable to pull off.
You could try a graduated ND filter to reduce the exposure of the sky or take multiple shots with proper sky/forground exposure and combine in post. The latter requires proper support or a program that can align things properly.