#star mapping
- Astrography — A descriptive branch of practical astronomy or an archaic terminological variant for astrophotography, having as its object the description, mapping, and cataloging of celestial bodies through images obtained using an astrograph. In a historical sense, it represents the technique of printing and faithfully reproducing star charts or photographic plates based on silver emulsion, used intensively in major international sky inventory projects of the 19th and early 20th centuries.