Sorry, didnt see the reply!
Come on, it simple. 'Blads are Medium Format cameras, whack on a wide angle lens with a small aperture and that will give you not only a vast depth of field, it should also capture anything 'in front' of you. As for how come all the photos are good, they are forgetting that NASA wont have released all the prints they took, plus it would be safe to say some cropping took place to straighten the horizons and make better composition.
Grab your camera, crank it too ISO 800, f16+ on aperture priority, go out and hold it at your chest and see how many shots you would call ok after a little cropping.