It is approaching Christmas, so watchers of the statue of Padre Kino on Kino Boulevard in Tucson will be looking for the red earmuffs. These have been appearing on the horse’s ears as a kindly seasonal gesture against the desert night’s cold. Further along the left side of the horse, resting on Kino’s saddlebag, you will notice a round instrument with what looks like a cross spanning its diameter. This is an astrolabe, or an earlier version of a sextant, and it was used for measuring the positions of celestial objects.