An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 5 Search : parallactic
parallactic
  دیدگشتی   
didgašti

Fr.: parallactique   

Of or pertaining to a parallax.

Adj. form of → parallax.

parallactic angle
  زاویه‌ی ِ دیدگشتی   
zâviye-ye didgašti

Fr.: angle parallactique   

Of an object in the sky, the angle between the → celestial pole, the object, and the → zenith. Since parallactic angle describes the orientation on the sky of the object for a particular observer, it can be an important quantity in some observations.

parallactic; → angle.

parallactic ellipse
  بیضی ِ دیدگشت   
beyzi-ye didgašt

Fr.: ellipse de parallaxe   

The path on the sky of the apparent position of a star as seen from the Earth, due to the Earth's annual motion around the Sun.

parallactic; → ellipse.

parallactic inequality
  ناهموگی ِ دیدگشتی   
nâhamugi-ye didgašti

Fr.: inégalité parallactique   

An irregularity in the Moon's motion caused by the Sun's gravitational attraction, which sets the Moon ahead or behind its normal orbital position. The Moon is about 2 arcminutes ahead of its expected position at first quarter, and a similar amount behind at last quarter.

parallactic; → inequality.

parallactic motion
  جنبش ِ دیدگشتی   
jonbeš-e didgašti

Fr.: mouvement parallactique   

The proper motion of a star due to the effect of the Sun's motion relative to the → local standard of rest.

parallactic; → motion.