Iana (goddess) Roscher includes Iana among the "indigitamenta", the list of deities maintained by Roman priests to assure that the correct divinity was invoked for rituals. Iana (goddess) Iana is the name of an ancient Roman goddess associated with arches and the moon, usually identified as either a form of Diana or the female counterpart of Janus. Varro (1st century BC) uses the name in his agricultural treatise, in a passage of dialogue in which the interlocutors explain that some farming tasks should be done when the moon is waxing, while the waning phase facilitates others, such as harvesting, shearing sheep, and
Celestial navigation Celestial navigation is the use of angular measurements (sights) between celestial bodies and the visible horizon to locate one's position in the world, on land as well as at sea. At a given time, any celestial body is located directly over one point on the Earth's surface. The latitude and longitude of that point is known as the celestial body's geographic position (GP), the location of which can be determined from tables in the nautical or air almanac for that year. The measured angle between the celestial body and the visible horizon is directly related to the distance between the