What is the central reference point for Celestial Navigation?

Celestial navigation relies primarily on the Earth as the central reference point. This system is based on the relationship between the navigator’s position on Earth and the positions of celestial bodies such as stars, the sun, and the moon. Navigators use measurements of angles between these celestial bodies and the horizon to determine their geographic location on the Earth's surface.

In celestial navigation, latitude and longitude are determined by observing the apparent motion of celestial objects relative to the Earth. By calculating these angles, navigators can correctly pinpoint their position on a chart. The Earth acts as the necessary framework within which all other celestial objects are referenced. While the sun and the moon play crucial roles in determining positions, they are not considered the central reference point; instead, they function as tools for measurement against the Earth.