An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 3 Search : comparator
blink comparator
  هم‌سنجگر ِ مژشی   
hamsanjgar-e možeši

Fr.: comparateur à clignotement   

An instrument for comparing two photographs of the same stellar field, taken at different times, by quickly alternating from one to the other. The purpose of the comparison is to detect subtle changes in the position or brightness of the stars.

blink; → comparator.

Hamsanjgar, → comparator; možeš noun from možidan, → blink.

comparator
  هم‌سنجگر   
hamsanjgar

Fr.: comparateur   

A device that compares the measured property of an object (position, shape, color, brightness) with a standard. → blink comparator.

L.L. comparator "comparer," from compara, → compare, + -tor suffix forming personal agent nouns, cf. Gk. -tor, Skt. -tar.

Hamsanjgar, agent noun from hamsanjidancomparison.

stereo-comparator
  هم‌سنج‌گر ِ استریو   
ham-sanj-gar-e estereyo

Fr.: stéréo comparateur   

A device that allows two images of the sky taken at different times to be optically superimposed so that changes in star brightness or moving objects can be detected.

stereo-; comparator, from L. comparare "to place together, match," from compar "alike, matching," → com-; → partial + -tor.

Ham-sanj-gar "comapartor," from ham-, → com-, + sanj stem of sanjidan "to compare" + -gar, → -or; → stereo-.