terrestrial gravity; the force exerted by the Earth that pulls objects toward its center

Ancient astronomical theory that the Earth is the stationary center of the universe, with the sun, moon, and planets revolving around it; later disproved by the [[日心说|日心說|ri4 xin1 shuo1]].

gravitation of the earth; the force that pulls objects toward the center of the earth

geocentric latitude, being the angle between the equatorial plane and a straight line starting from the center of the earth