In quest of the “real” but sadly invisible Planet Vulcan

    Yesterday, in a post entitled “Day breaks over Mercury in a white heat,” I quoted a passage from Dava Sobel, The Planets (New York: Penguin, 2006), 41, rxplaining how the “discovery” of the planet Neptune by means of calculations and predictions based on “perturbed” behavior of other astronomical objects took place a full year […]