annual parallax


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Related to annual parallax: stellar parallax

annual parallax

n
(Astronomy) See parallax2
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.annual parallax - the parallax of a celestial body using two points in the earth's orbit around the sun as the baselineannual parallax - the parallax of a celestial body using two points in the earth's orbit around the sun as the baseline
parallax - the apparent displacement of an object as seen from two different points that are not on a line with the object
stellar parallax - the heliocentric parallax of a star
Translations
References in periodicals archive ?
This left two substantive challenges to heliocentrism, the first concerned with motion, the second with annual parallax and its implications for star sizes.
He and fellow Jesuit Francesco Maria Grimaldi (1618-63; who would later go on to discover and name the phenomenon of diffraction mentioned earlier) published in Riccioli's 1651 Almagestum Novum a table of the apparent sizes of many stars measured telescopically (along with a detailed description of their observing methods so that anyone could reproduce their results), and a table of the physical sizes stars would have were they to lie at the distances required by the Copernican theory (distances that had grown larger thanks to increasingly sensitive, but still fruitless, efforts to detect annual parallax).
The dual beam system of the VERA enables the measurement of the annual parallax, thus the parallax distance to the sources.
Choice of the star catalogue should consider both precision of the coordinates and number of stars, as well as values of proper motions and annual parallax capacity.
Galilei also relied on the possibility of calculating the annual parallax of the New Star in order to give a mathematical demonstration of the Earth's motion around the Sun.

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