When I was a kid I had this large (coffee table-ish) hard cover illustrated book, which was basically a travel-companion guide for people going on this intergalactic cruise. The whole thing was spun (basically) as a brochure for all these different exotic destinations that the cruise would visit. It was (as I recall) incredibly well crafted, with a lot of very clever detail and gorgeous art.
“Tour of the Universe”...? You can buy second-hand copies on Amazon.
It isn't Sci-Fi, but your description makes me think of the book "Galaxies." It's non-fiction with lots of information on stars, galaxies, etc., but I'm pretty sure there's an overall narrative that runs through the book presenting the information as if to passengers on an intergalactic cruise. It certainly has beautiful pictures.