First I want to say that this is a beautiful image, Mr. Palcholka is very talented. However, it does bother me that he does not admit that this image is a composite of more than one image. I don't understand why he feels compelled to state it is only one image with only one exposure. I read on another site where he admits that it is a panoramic composite of four images that were spliced together by a photography house.
I've worked in the graphic arts industry for over 30 years and have done digital retouching on images, and also am an amateur astronomer. The image has definitely been manipulated, its color levels, contrast, etc. And as for a composite of separate images, the obvious sign is the horizon—it is different from the daylight image posted on this site—you can't move mountains. This leads me to suspect the image of the Milky Way was a separate image too.
Mr. Palcholka, "There is nothing wrong with composite images, what is wrong is stating that it is not and trying to deceive others to that fact."