who had gone so far as to include the text of Galileo's condemnation in his own publications. Work concerning the Moon Riccioli and Grimaldi extensively studied the Moon, of which Grimaldi drew maps. This material was included in Book 4 of the New Almagest. Grimaldi's maps were based on earlier work by Johannes Hevelius and Michael van Langren. On one of these maps, Riccioli provided names for lunar features—names that are the basis for the nomenclature of lunar features still in use today. For example, Mare Tranquillitatis (The Sea of Tranquility, site of the Apollo 11 landing in 1969), received its name from Riccioli. Riccioli named large lunar areas for weather. He named craters for significant astronomers, grouping them by philosophies and time periods. Although Riccioli rejected the Copernican theory, he named a prominent lunar crater "Copernicus", and he named other important craters after other proponents of the Copernican theory such as Kepler, Galileo and Lansbergius. Because craters that he and Grimaldi named after themselves are in the same general vicinity as these, while craters named for some other Jesuit astronomers are in a different part of the Moon, near the very prominent crater named for Tycho Brahe, Riccioli's lunar nomenclature has at times been considered to be a tacit expression of sympathy for a Copernican theory that, as a Jesuit, he could not publicly support. However, Riccioli said he put the Copernicans all in stormy waters (the Oceanus Procellarum). Another noteworthy feature of the map is that Riccioli included on it a direct statement that the Moon is not inhabited. This ran counter to speculations about an inhabited Moon that had been present in the works of Nicholas of Cusa, Giordano Bruno, and even Kepler, and which would continue on in works of later writers such as Bernard de Fontenelle and William Herschel. Arguments concerning the motion of the Earth A substantial portion of the New Almagest (Book 9, consisting of 343 pages) is devoted to an analysis of the world system question: Is the universe geocentric or heliocentric? Does the Earth move or is it immobile? The historian of science Edward Grant has described Book 9 as being the "probably the lengthiest, most penetrating, and authoritative" analysis of this question made by "any author of the sixteenth and seventeenth centuries", in his opinion apparently superseding even Galileo's Dialogue Concerning the Two Chief World Systems — Ptolemaic and Copernican.