Parallax

Word PARALLAX
Character 8
Hyphenation par al lax
Pronunciations N/A

Definitions and meanings of "Parallax"

What do we mean by parallax?

A change in the apparent position of an object relative to more distant objects, caused by a change in the observer's line of sight towards the object. noun

An apparent displacement of an object observed, due to real displacement of the observer, so that the direction of the former with reference to the latter is changed. noun

In optics, an apparent shifting of the spider-lines in a telescope-reticle as the eye is moved before the eyepiece: it is due to the non-coincidence of the threads with the focal plane of the object-glass. noun

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

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. noun

The annual parallax. See annual parallax, below. noun

The greatest value of the heliocentric parallax, or the greatest annual apparent change of place of a body as seen from the earth and sun; it is equivalent to the parallax of an astronomical object which would be observed by taking observations of the object at two different points one astronomical unit (the distance of the Earth from the sun) apart, if the line joining the two observing points is perpendicular to the direction to the observed object. The distance of an astronomical object from the Earth is inversely proportional to the annual parallax. A star which has an annual parallax of one second of an arc is considered to be one parsec (3.26 light years) distant from the earth; a star with an annual parallax of one-hundredth second of an arc is 326 light years distant. See parsec in the vocabulary, and stellar parallax, below. noun

The apparent difference in position of an object as seen separately by one eye, and then by the other, the head remaining unmoved. noun

The parallax of a body with reference to the earth's center. This is the kind of parallax that is generally understood when the term is used without qualification. noun

The parallax of a body with reference to the sun, or the angle subtended at the body by lines drawn from it to the earth and sun. noun

The geocentric parallx of a heavenly body when in the horizon, or the angle subtended at the body by the earth's radius. noun

The apparent displacement in position undergone by an object when viewed by either eye singly. noun

(of an optical instrument), their apparent displacement when the eye changes its position, caused by their not being exactly in the focus of the object glass. noun

The annual parallax of a fixed star. noun

The change of angular position of two stationary points relative to each other as seen by an observer, due to the motion of an observer. noun

The apparent shift of an object against a background due to a change in observer position. noun

The angle of seeing of the astronomical unit. noun

The apparent displacement of an object as seen from two different points that are not on a line with the object noun

An apparent shift in the position of two stationary objects relative to each other as viewed by an observer, due to a change in observer position.

The angle of seeing of the astronomical unit.

Synonyms and Antonyms for Parallax

  • Synonyms for parallax
  • Parallax synonyms not found!!!
  • Antonyms for parallax
  • Parallax antonyms not found!

The word "parallax" in example sentences

"Do not let us fear," wrote Lalande in his _Astronomie des Dames_, "do not let us fear to use the term parallax, despite its scientific aspect; it is convenient, and this term explains a very simple and very familiar effect." ❋ Camille Flammarion (1883)

I get the impression the author in the last link should have actually read the Wikipedia article he linked to, because what he calls parallax it calls stereopsis. ❋ Unknown (2010)

The term parallax proving “caviare to the general,” they further explained that it meant the angle formed by the inclination of two straight lines drawn from either extremity of the earth’s radius to the moon. ❋ Unknown (2003)

If they do, the parallax is not set for the range of the target you are using. ❋ Unknown (2009)

Not to mention that a fixed 10 power scope with no adjustable parallax is problematic at best, in an urban combat environment. ❋ Unknown (2006)

They were as much puzzled about the meaning of the word parallax as I had been with regard to the word algebra, and only learnt what it meant when Brewster went to study for the kirk in Edinburgh. ❋ Mary Somerville (1826)

To be able to do this, astronomers have developed what's known as parallax, which is then used to calibrate distance indicators for objects further away, which are then used to calibrate even further objects, etc .... ❋ Unknown (2009)

All the planets have disappeared, the moon’s phases are screwy, and the sun’s parallax is too large. ❋ Unknown (2009)

If that doesn’t impress you, consider the vertical and horizontal parallax is so smooth and perfect you’ll be able to walk around the setup and swear you could reach out and touch it. ❋ Unknown (2007)

One method uses what is known as a parallax barrier in front of a conventional liquid-crystal display screen, a layer of material with precisely placed slits that allow each eye to see a different set of pixels on the display. ❋ Unknown (2010)

Most importantly, the background scrolls at a different speed than the foreground (called parallax scrolling) and is most likely a 3d-rendering (the original photo was almost certainly shot in fron of a green screen). ❋ Radii (2008)

This difference is called the parallax of the stars; and the problem of measuring it is one of the most delicate and difficult in the whole field of practical astronomy. ❋ Unknown (1909)

For such large distances the _secular_ parallax, which is caused by the progressive motion of the sun in space, may give better results, especially if the mean distance of a group of stars is simultaneously determined. ❋ Carl Vilhelm Ludvig Charlier (1898)

Earth, cross upon Venus, and form an identical angle upon the Sun. Venus is thus at the apex of two equal triangles, the bases of which rest, respectively, upon the Earth and on the Sun. The measurement of this angle gives what is called the parallax of the Sun.-- that is, the angular dimension at which the Earth would be seen at the distance of the Sun. ❋ Camille Flammarion (1883)

The celebrated mathematician, Encke, therefore reviewed them in 1822-'24, and came to the conclusion that the sun's horizontal parallax, that is, the angle under which the semi-diameter of the earth is seen from the sun, is 8 576/1000 seconds; this gave as the distance 95,274,000 miles. ❋ Unknown (1881)

Basing his observations on Maimuni's and Abraham ben Chiya's statement of the sphericity of the earth, Israeli showed that the heavenly bodies do not seem to occupy the place in which they would appear to an observer at the centre of the earth, and that the two positions differ by a certain angle, since known as parallax in the terminology of science. ❋ Gustav Karpeles (1878)

Cross Reference for Parallax

What does parallax mean?

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