Every camera on earth, even video cameras, take good photos of the stars. It doesn't even have to be fully dark. I do it all the time, sometimes every night. Every night! Now, you are telling me that those same cameras can't take photos of stars when in space? Without the earth's atmosphere in the way? I think there is something wrong with your thinking.

See for yourself. Go out tonight and take a photo of the night sky with your cell phone.