Astrognosy is the study of astronomical knowledge or science. There are many synonyms for the word astrognosy, one of which is astrophysics. This field of study focuses on the physical properties and behavior of celestial objects, such as stars, planets, and galaxies. Another synonym for astrognosy is astronomy, which is the study of the universe beyond the Earth's atmosphere, including the positions, motions, and properties of celestial objects. Cosmology is another synonym for astrognosy, which deals with the origin, evolution, and structure of the universe. Other synonyms for astrognosy include space science, astrometry, celestial mechanics, and observational astronomy, to name just a few.