Here is another image from the same episode.
It shows that both ships are in an environment that lacks both matter or energy. This is opposed to the image you posted which shows the
Enterprise reflecting the radiant energy of a star. We can read the registry on the
Enterprise because of this radiant energy. Furthermore, there were no floodlights on the
Galaxy-class starships. (The floodlights were used to illuminate the registry on other ships.)
http://tng.trekcore.com/gallery/albu...silence114.jpg