'earth-centered' originates from the combination of 'earth' and 'centered', where 'earth' refers to the planet we live on and 'centered' means having as a central point.

'Earth-centered' evolved from the concept of 'geocentric', which was used in ancient astronomy to describe a universe with Earth at its center.

Initially, it meant 'having Earth as the center of the universe', but now it can also refer to any system or model that places Earth at its center.