To measure large distances, such as the distance of a planet or a star from Earth, astronomers use the principle of parallax. Here, the term parallax is the semi-angle of inclination between …

The meaning of PARALLAX is the apparent displacement or the difference in apparent direction of an object as seen from two different points not on a straight line with the object; especially : …

Nov 3, 2025 · Parallax, in astronomy, the difference in direction of a celestial object as seen by an observer from two widely separated points. The measurement of parallax is used directly to …

Apparent and obvious (Definition of parallax from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

Apr 30, 2024 · Parallax is the apparent shift in the position of an object when observed from different viewpoints. This effect occurs because the perspective from which an object is …

Definition of parallax noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

There are four meanings listed in OED's entry for the noun parallax, one of which is labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

Parallax is when an object appears to change its position because the person or instrument observing it has changed their position.

Aug 21, 2025 · Parallax is a phenomenon in which an object appears to shift its position when viewed from different perspectives. This effect is commonly observed in everyday life, such as …

Nov 1, 2025 · parallax (third-person singular simple present parallaxes, present participle parallaxing, simple past and past participle parallaxed) (transitive) To measure (a distance) …