Word origin · etymology
Greek combining forms.
Geo- means earth and -centric means centered; the name specifies Earth as the positional origin.
How we know · epistemology
Observer convention
Earth’s center is a mathematical observation origin. Geocentric positions are reproducible model outputs, but they omit the surface observer’s parallax and are not identical to every visible local direction.
Connected concepts
Terms used in this explanation
Mentioned in 9 other entries
These links connect subjects and terminology. They do not establish a shared historical origin.
Sources & provenance
Use the citations beside each section to distinguish a calculation convention, a historical teaching and an editorial example.