Stelography, also known as astrometry, is the branch of astronomy that deals with the measurement of the positions and movements of celestial bodies. Synonyms for stelography include astrometry, star mapping, and celestial cartography. Astrometry is the most commonly used term for describing the observation and measurement of the positions, distances, and motions of stars and other celestial objects. On the other hand, star mapping is a phrase used to describe the act of creating detailed maps of the stars, planets, and other objects in space. Lastly, celestial cartography is a word used to describe the study and mapping of the universe. Each of these synonyms describes the vast and fascinating field of stelography.