Astronomy Answers: From the Astronomical Dictionary

Astronomy Answers
From the Astronomical Dictionary

[Astronomy Answers] [Dictionary] [AnswerBook] [Universe Family Tree] [Science] [Starry Sky] [Planet Positions] [Calculate] [Colophon]

The description of the word you requested from the astronomical dictionary is given below.

the parallax

The parallax is a motion that an object seems to make because the observer has moved to a different location. The parallax of a star is the angle over which the star moves during a year because of the motion of the Earth around the Sun. If that parallax is equal to (p) arcseconds, then that star is at (1/p) parsec from the Earth.