This urban scale work wonders about a great paradox of the civilized world in which, more and more, city lights disallow the possibility of seeing the stars; man loses visual contact with the universe while the streets of the city light up and the immediate material world happens to occupy the entire capacity of human perception. The theme of the twelve constellations of the ecliptic, repeated on both sides under twelve bridges over the Medellín River, provokes the bystander that passes through the highway to take a glimpse at this paradox.