parallactic motion

noun

, Astronomy.

1. the apparent motion of stars due to the earth's orbital motion.

Word History and Origins

Origin of parallactic motion¹

First recorded in 1885–90

Example Sentences

The most obvious and direct method is to determine the parallactic motion of the stars of known parallax.

From Project Gutenberg

From the parallactic motion of the star it is possible to deduce its distance from the sun, or its parallax.

From Project Gutenberg

If we ascertain the parallactic motion of a group of stars, then we can find their average distance.

From Project Gutenberg