looking for night sky skymap/envmap

I’m having no luck. Anybody know where I can find one? I need real star patterns, not random ones. (does not have to be actual photo images, meaing it could be the result of a star-gazer program)
I also needs to be a full-sky image, either a skymap, environmap, sphere-map, whatever I can use to fll the sky without artifacts. I SUPPOSE I can use a half-sphere, but a full-sphere image would be better.