Parallax.
(Of the Gr. pa?)(to?, change, difference).
1. f. Astr. The difference between the apparent positions in the sky with a star, according to the point where it is observed.
1. f. Astr. Difference of angles with the radius of the Earth's orbit are two lines aimed at an astro from both ends.
1. f. Astr. Difference of angles that form with the vertical lines aimed at a star from the observation point and the center of the Earth.
