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: 15 Search : observation
follow-up observation
  نپاهش ِ پیگیر   
nepâheš-e peygir

Fr.:   

An observation which expands previous observations and aims at obtaining complementary data in particular with other telescopes/instruments.

Follow-up, from follow, from O.E. folgian, fylgan "to follow, pursue," from W.Gmc. *fulg- (cf. O.Fris. folgia, M.Du. volghen, Ger. folgen "to follow") + up, O.E. up, uppe (cf. Du. op, Ger. auf "up, upward"), from PIE base *upo "up from below;" cf. O.Pers./Av. upā; Skt. úpa; Gk. hypo; L. sub, → hypo-; → observation.

Nepâheš, → observation; peygir, from pey "after; step," related to "foot, step, track," → foot, + gir present stem of gereftan "to take, seize" (Mid.Pers. griftan, Av./O.Pers. grab- "to take, seize," cf. Skt. grah-, grabh- "to seize, take," graha "seizing, holding, perceiving," M.L.G. grabben "to grab," from P.Gmc. *grab, E. grab "to take or grasp suddenly;" PIE base *ghrebh- "to seize").

ground-based observation
  نپاهش از زمین   
nepâheš az zamin

Fr.: observation au sol   

An astronomical observation carried out using a telescope on Earth, as opposed to that from an orbiting satellite.

ground; based, adj. of base, from O.Fr. bas, from L. basis "foundation," from Gk. basis "step, pedestal," from bainein "to step;" → observation.

Nepâheš, → observation; az "from," → ex-; zamin, → ground.

high-resolution observation
  نپاهش ِ مه-واگشود   
nepâheš-e mehvâgošud

Fr.: observation à haute résolution   

An observation that provides a particularly narrow, peaked image of a point source. → point spread function.

high; → resolution; → observation.

meridian observation
  نپاهش ِ نیمروزانی   
nepâheš-e nimruzâni

Fr.: observation au méridien   

The observation of a star when it crosses an observer's meridian.

meridian; → observation.

meteorological observation
  نپاهش ِ هواشناختی   
napâheš-e havâšenâxti

Fr.: observation météorologique   

Evaluation or measurement of one or more meteorological elements.

Meteorological, of or pertaining to → meteorology; → observation.

observation
  نپاهش، نپاه   
nepâheš, nepâh

Fr.: observation   

1) Act or instance of observing; → observe.
2) Careful watching of an astronomical object or event using appropriate instruments, usually for collecting data.

Verbal noun of → observe.

observational
  نپاهشی   
nepâheši

Fr.: observationnel   

Pertaining to, or founded on observation, especially based on observation rather than theory.

Adj. of → observation.

observational astrophysics
  اخترفیزیک ِ نپاهشی   
axtarfizik-e nepâheši

Fr.: astrophysique observationnelle   

That part of astrophysics that is mainly concerned with the collection of observational data, in comparison with theoretical astrophysics

observational; → astrophysics.

observational bias
  وَرک ِ نپاهشی   
varak-e nepâheši

Fr.: biais observationnel   

An error in observation arising from systematically favoring brighter or weaker objects or some particular object morphologies; e.g. → Malmquist bias.

observational; → bias.

observational cosmology
  کیهان‌شناسی ِ نپاهشی   
keyhânšenâsi-ye nepâheši

Fr.: cosmologie observationnelle   

The application of observational data to the study of the Universe as a whole.

observational; → cosmology.

observational effect
  ا ُسکر ِ نپاهشی   
oskar-e nepâheši

Fr.: effet observationnel   

A feature appearing in an observation, which is not intrinsic to the object observed, but is due to the inappropriate method used (e.g. limited angular resolution).

observational; → effect.

observational error
  ایرنگ ِ نپاهشی   
irang-e nepâheši

Fr.: erreur observationnelle   

The difference between a measured value of quantity and its true value.

observational; → error.

off-source observation
  نپاهش ِ اپ-خن   
nepâheš-e ap-xan

Fr.: observation hors source   

An observation when the telescope is pointed away from the source in order to measure the sky background contribution.

off-; → source; → observation.

on-source observation
  نپاهشِ بر-خن   
nepâheš-e bar-xan

Fr.: observation sur la source   

In comparison with → off-source observation, an observation which is concerned with the source itself.

on-; → dource; → observation.

single-dish observation
  نپاهش ِ تک-جام   
nepâhešè-e tak-jâm

Fr.: observation avec antenne uinique   

A radio astronomical observation which uses only one antenna, in contrast to interferometric observations.

single; → dish; → observation.