Parallax

(n.) The apparent displacement, or difference of position, of an object, as seen from two different stations, or points of view.

Parallax - Other Definitions

(n.) The apparent displacement, or difference of position, of an object, as seen from two different stations, or points of view.
(n.) The apparent difference in position of a body (as the sun, or a star) as seen from some point on the earth's surface, and as seen from some other conventional point, as the earth's center or the sun.