👉 In mathematics, a geocentric system is a type of coordinate system where all points on Earth are considered to be at the same center of rotation. This means that all lines and planes are oriented along the axis of rotation, with the z-axis being parallel to the x-axis, and the y-axis being parallel to the z-axis. Geocentric systems are commonly used in astronomy and geology, as they simplify the problem of determining positions of celestial bodies. In a geocentric system,