An Etymological Dictionary of Astronomy and Astrophysics

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory



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Number of Results: 83 Search : non
"nongravitational forces"
  "نیروهای ِ ناگرانشی"   
"niruhâ-ye nâgerâneši" (#)

Fr.: "forces non-gravitationnelles"   

The forces of jets from a comet's nucleus that can cause a rocket-like effect and alter a comet's direction of motion slightly.

non-; → gravitational; → force.

  انام، بینام   
anâm, binâm

Fr.: anonyme   

Having an unknown or unacknowledged name. → anonymous object.

L. annymus, from Gk. annumos "nameless," from → an- "without" + onoma, onuma "name". Compare with L. nomen, Skt. nama, Av. nama, Mod. Pers. nâm, PIE *nomen "name".

Anâm, from Persian → a-, an- "without" + nâm "name," as above. Binâm, from bi- "without" + nâm.

anonymous object
  بر‌آخت ِ انام، ~ بینام   
barâxt-e anâm, ~ binâm

Fr.: objet anonyme   

An → astronomical object which has not been catalogued.

anonymous; → object.

Be phenomenon
  پدیده‌ی ِ Be   
padide-ye Be

Fr.: phénomène Be   

The episodic occurrence of abrupt → mass loss in → Be stars resulting in → Balmer lines in emission and → infrared excess. The Be phenomenon results from a combination of a long-term secular effect and short-term instabilities, such as pulsation. The secular evolution brings the star close enough to the critical → break-up velocity, so that the additional velocity field due to the instability may allow some mass ejection (Maeder 2011).

Be star; → phenomenon.

Canon der Finsternisse
  فهرست ِ گرفت‌ها   
fehrest-e gerefthâ (#)

Fr.: Canon des éclipses   

Canon of Eclipses. The most famous catalogue of solar and lunar eclipses. Published in 1887 by Theodor von Oppolzer, the catalogue contains the elements of all solar and lunar eclipses between 1208 BC and 2161 AD. It has been superseded by the calculations of F. Espenak and J. Meeus, Five Millennium Canon of Solar Eclipses: -1999 to +3000 (NASA/TP-2006-214141) and Five Millennium Canon of Lunar Eclipses: -1999 to +3000 (NASA/TP-2009-214172).

Canon, from L. canon, from Gk. kanon "a straight rod, a measuring rod, rule;" Ger. Finsternisse, plural from finsternis "eclipse; darkness," from finster "dark," M.H.G. vinster, O.H.G. finstar "dark" + -nis suffix forming abstract nouns, → -ness.

Fehrest "index, catalogue, canon," → index; gerefthâ plural of gereft, → eclipse.


Fr.: canonique   

1) General: Pertaining to, established by, or conforming to a canon, i.e. a law or a general rule (especially in ecclesiastical matters).
2) Math.: Relating to the simplest or standard form of a general function, equation, rule, etc.

M.M. canonicalis, from canonic(us), from L. canon, from Gk. kanon "a straight rod, a measuring rod, rule " + alis, → -al.

Hanjârvâr, from hanjâr "a mason's rule, any string or instrument used by builders in laying stones straight; rule, law, way, custom; a norm" + -vâr suffix meaning "having, endowed with; like, in the manner of."

canonical change
  دگرشد ِ هنجاروار، دگرش ِ ~   
degaršod-e hanjârvâr, degareš-e ~

Fr.: changement canonique   

A periodic change in one of the components of the orbit of a celestial object.

canonical; → change.

canonical coordinates
  هماراها‌یِ هنجاروار   
hamârâhâ-ye hanjârvâr,

Fr.: coordonnées canoniques   

Any set of generalized coordinates of a system together with their → conjugate momenta.

canonical; → coordinates.

canonical correlation
  هم‌باز‌آنشِ هنجاروار   
hambâzânš-e hanjârvâr

Fr.: correlation canonique   

The highest correlation between linear functions of two data sets when specific restrictions are imposed upon them.

canonical; → correlation.

canonical equation
  هموگشِ هنجاروار   
hamugeš-e hanjârvâr

Fr.: équation canonique   

The most general form of an equation.

canonical; → equation.

canonical form
  دیسه‌یِ هنجاروار   
dise-ye hanjârvâr

Fr.: forme canonique   

The simplest expression of an equation, statement, or rule.

canonical; → form.

canonical IMF
   IMF ِ هنجاروار   
IMF-e hanjârvâr

Fr.: IMF canonique   

A two-component stellar → initial mass function with → slopes of 1.3 and 2.3 for massive and low mass stars, respectively. Also called universal IMF.

canonical; → IMF.

canonical model
  ترز ِ هنجاروار، مدل ِ ~   
tarz-e hanjârvâr, model-e ~

Fr.: modèle canonique   

A model for the formation of the Moon according to which the → Moon results from a giant impact. A Mars-sized body (often referred to as → Theia) obliquely collided with the proto-Earth at the mutual escapee velocity. This specific giant impact is often used to represent all giant impacts. A recent advanced version of the canonical model is called → giant impact hypothesis.

canonical; → model.

canonical momentum
  جنباکِ هنجاروار   
jonbâk-e hanjârvâr

Fr.: moment cinétique canonique   

Same as → conjugate momentum.

canonical; → momentum.

canonical upper limit
  حد ِ زبرین ِ جرم   
hadd-e zabarin-e jerm

Fr.: limite supériure canonique   

A physical upper mass limit near 150 Msun assumed for the stellar → initial mass function (Kroupa et al. 2012, arXiv:1112.3340).

canonical; → upper; → limit.

canonically conjugate variable
  ورتنده‌یِ هنجاروارانه همیوغ   
vartande-ye hanjârvârâné hamyuq

Fr.: variable canoniquement conjuguée   

A generalized coordinate and its → conjugate momentum.

Canonically, adverb from → canonical; → conjugate; → variable.

Gibbs canonical distribution
  واباژش ِ هنجاروار ِ گیبس   
vâbâžeš-e hanjârvâr-e Gibbs

Fr.: distribution canonique de Gibbs   

The probability distribution of the various possible states of a certain → quasi-closed subsystem.

Gibbs free energy; → canonical; → distribution.

law of non-contradiction
  قانون ِ ناپادگویی   
qânun-e nâpâdguyi

Fr.: principe de non-contradiction   

Same as → principle of non-contradiction.

law; → non-; → contradiction.

nâ- (#)

Fr.: non-   

A prefix meaning "not."

From O.Fr. non-, from L. non "not," from Old L. noenum "not one;" in some cases perhaps from M.E. non "not" (adj.), from O.E. nan.

Nâ- "no, not," variants na, ni, ma- (prohibitive) "not;" from Mid.Pers. nê, ma "no, not;" O.Pers. naiy, nai "not;" Av. nôit, naē "not;" cf. Skt. "not;" cf. L. ne-, in-, un-; Gk. ni; Lith. ; O.C.S. ne "not;" PIE *ne-.

non-algebraic function
  کریای ِ ناجبری   
karyâ-ye nâjabri

Fr.: fonction non algébrique   

A → transcendental function. Examples are: exponential, logarithmic, and trigonometric functions.

non-; → algebraic + → function.

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