The discussion revolves around the lack of a specific name for the central projection of a star's position onto the celestial sphere, with terms like "Celestial Position," "Celestial Coordinates," and "RA and Dec" being suggested. The concept of orthogonal projection from space to a plane is mentioned, alongside the idea that a straightforward projection from space to a sphere may not require a unique designation. Historical references are made to the contributions of figures like Hipparchus, who created the first celestial sphere map in the second century BC. The conversation reflects on the simplicity of the concept and the absence of a formal name, despite the potential for historical nomenclature. Ultimately, the discussion highlights the intersection of astronomy and historical terminology.
