Luna (goddess) as Juno Covella, Juno of the crescent moon. Both Juno and Diana were invoked as childbirth goddesses with the epithet "Lucina". Luna is often depicted driving a two-yoke chariot called a "biga", drawn by horses or oxen. In Roman art, the charioteer Luna is regularly paired with the Sun driving a four-horse chariot ("quadriga"). Isidore of Seville explains that the "quadriga" represents the sun's course through the four seasons, while the "biga" represents the moon, "because it travels on a twin course with the sun, or because it is visible both by day and by night—for they yoke together one
Celestial navigation celestial body's GP and the observer's position. After some computations, referred to as sight reduction, this measurement is used to plot a line of position (LOP) on a navigational chart or plotting work sheet, the observer's position being somewhere on that line. (The LOP is actually a short segment of a very large circle on Earth that surrounds the GP of the observed celestial body. An observer located anywhere on the circumference of this circle on Earth, measuring the angle of the same celestial body above the horizon at that instant of time, would observe that body to be at