This pics look photoshopped because they are. When a telescope (eg hobble) takes a picture it is not like real thing.real thing may be dark or even invisible or visible only on special light with a certain wave length.So the telescope should capture all waves (even those that are not visible by human eye). So after that data must be visualized to be visible by human eye. Of cource it is not done by photoshop but some thing similar. So colors may look unnatural or photoshoped.
I think this is the reason but i may be wrong.anyway a have not physics PHD.