In my previous posts, I've linked to some hypothetical exo-lifeforms as imagined by artists with an inclination to science, or scientist inclined to the arts. As shown in Snaiad and Expedition, those works of art--speculative as they may be--provide a glimpse of what could thrive on other planets. This time, I will take you to these worlds as imagined by an astronomer. Meet Dan Durda, a planetary scientist who paints distant worlds in his spare time while not doing daredevil acts like flying jetplanes or diving in underwater caves. Thus, what he comes up with are absolutely breath-taking worlds.