Geocentric model
is a superseded description of the Universe with Earth at the center that is Under most geocentric models, the Sun, Moon, stars, and planets all orbit Earth.
But the observations do not extend continuously throughout the year, and do not include a sufficient length of the central line on each evening to enable us to distinguish certainly the heliocentric latitude of the central line, as distinct from its apparent geocentric position.
Geocentric parallax is the angle between the direction of the body as seen from the surface of the earth and the direction in which it appears from the centre of the earth.
According To The Best Determinations Of Modern Astronomy (Le Verrier'S Solar Tables, Paris, 1858, P. 102), The Mean Geocentric Motion Of The Sun In Longitude, From The Mean Equinox During A Julian Year Of 365.25 Days, The Same Being Brought Up To The Present Date, Is 360 0 27 685.
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