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: 13048 Search : far
coronal streamer
  درفشک ِ هورتاجی   
derafšak-e hurtâji

Fr.: grand jet coronal   

A bright, narrow stream of particles traveling through the Sun's corona, visible in images taken with a coronagraph or during a total solar eclipse. Coronal streamers represent the most outwardly extended structures in the solar corona and result from the interaction between the solar slow wind and the large-scale magnetic field. → helmet streamer.

coronal; → streamer.

coronium
  کورونیوم   
koroniom

Fr.: coronium   

A hypothetical chemical element once thought to be at the origin of the → coronal lines seen during a solar → total eclipse

From coron-, from → corona + → -ium

CoRot
  کورو   
Corot

Fr.: CoRot   

An astronomical satellite led by the French Space Agency (CNES) in conjunction with the European Space Agency (ESA) and other international partners. Launched on 27 December 2006, its two objectives are to search for → extrasolar planets with short → orbital periods, particularly those of large terrestrial size, and to perform → asteroseismology by measuring solar-like oscillations in stars. Corot is the first spacecraft dedicated to extrasolar planet detection. It is equipped with a 27-cm diameter afocal telescope and four CCD cameras sensitive to tiny variations of the light intensity from stars. Corot detected its first extrasolar planet, Corot-1b, in May 2007. Mission flight operations were originally scheduled to end 2.5 years from launch but they have been extended to January 2010.

CoRot, acronym from → COnvection, → ROtation, and planetary → Transits, chosen for its similarity to the name of the French painter Jean Baptiste Camille Corot (1796-1875), the first of the great modern landscapists, who marked a significant departure from academic tradition and strongly influenced the development of landscape painting in the 19th century.

corotate
  هم‌چرخیدن   
hamcarxidan

Fr.: être en corotation   

To rotate jointly with or at the same speed as another rotating body.

co-; → rotate.

corotating interaction region (CIR)
  ناحیه‌ی ِ اندرژیرش ِ هم‌چرخنده   
nâhiye-ye andaržireš-e hamcarxandé

Fr.: région d'interaction en corotation   

A spiral-shaped density enhancement formed around a star when fast stellar winds collide with slower material. This large-scale wind structure can extend from the stellar surface to possibly several tens of stellar radii. The CIRs can be produced by intensity irregularities at the stellar surface, such as dark and bright spots, magnetic loops and fields, or non-radial pulsations. The surface intensity variations alter the radiative wind acceleration locally, which creates streams of faster and slower wind material. CIRs are responsible for the → discrete absorption components seen in some ultraviolet → resonance lines of → hot stars (S. R. Cranmer & S. P. Owocki, 1996, ApJ 462, 469).

corotate; → interaction; → region.

corotation
  هم‌چرخش   
hamcarxeš

Fr.: corotation   

The act of corotating.

Verbal noun of → corotate.

corotation radius
  شعاع ِ هم‌چرخش   
šoâ'-e ham-carxeš

Fr.: rayon de corotation   

1) In the → X-wind model of → accretion, the distance from the star where the → centrifugal force on a particle corotating with the star balances the → gravitational attraction; in other words, where the → accretion disk rotates at the same → angular velocity as the star.
2) In a → spiral galaxy, the place where the spiral → pattern speed has the same velocity as the → rotation curve of the → galactic disk. In the frame rotating with the wave, particles inside this radius will appear to revolve in the direction of the frame rotation (prograde) while outside this corotation radius, they will be retrograde.

corotation; → radius.

corotation resonance
  باز‌آوایی ِ هم‌چرخش   
bâzâvâyi-ye ham-carxeš

Fr.: résonance de corotation   

That condition of a → galactic disk at an orbital radius in which the → angular velocity of the disk equals the → pattern speed. It is significant that the spiral wave pattern rotates as a rigid body (ΩP = const), whereas the galactic disk rotates differentially (Ω is a function of galactocentric distance r). The distance rC at which the two angular velocities coincide (Ω(rC) = ΩP) is referred to as the → corotation radius. The corotation resonance and its position within the galaxy is one of the fundamental properties of a spiral galaxy.

corotation; → resonance.

corposant
  آتش ِ سپنت المو   
âtaš-e sepant Elmo

Fr.: feu de Saint-Elme   

Same as → Saint Elmo's fire.

From Portuguese corpo santo "holy body," from L. corpus sanctum; → corpuscle; → heiligenschein.

corpuscle
  کرپول   
karpul

Fr.: corpuscule   

A discrete particle, such as a → photon or an → electron. See also → corpuscular radiation, → corpuscular theory of light.

From L. corpusculum, dim. of corpus "body," cf. Av. kehrp-, kərəf- "body, form," Skt. krp- "body, form," O.E. hrif "belly," O.H.G. href "womb, belly, abdomen;" Ger. Körper (originally Korper) is a loan word from L. corpus; PIE *kwrpes, from base *kwrep- "body, form." → -ule.

Karpul, from Mid.Pers. karp "body, form," cognate with L. corpus, as above, + diminutive suffix → -ule.

corpuscular radiation
  تابش ِ کرپولی   
tâbeš-e karpuli

Fr.: rayonnement corpusculaire   

A stream of atomic or subatomic particles.

Corpuscular, adj. from → corpuscle; → radiation.

corpuscular theory of light
  نگره‌ی ِ کرپولی ِ نور   
negare-ye karpuli-ye nur

Fr.: théorie corpusculaire de la lumière   

Newton's theory according to which light is made up of point-like particles without any mass. It failed to explains several phenomena: simultaneous reflection and refraction at a semi-transparent boundary, interference, diffraction and polarization. Moreover, it requested that the speed of light be greater in a denser medium than in a rarer medium; this prediction is contrary to experimental results. In 1924 Louis de Broglie postulated that matter has not only a corpuscular nature but also a wave nature, and subsequent experiments confirmed de Broglie's model.

Corpuscular, adj. from → corpuscle; → theory, → light.

correct
  ۱) ارشا؛ ۲) ارشاییدن   
1) aršâ; 2) aršâyidan

Fr.: 1) correct; 2) corriger   

1) Free from error; conforming to an acknowledged or accepted standard or fact; true or accurate.
2) To remove the errors or mistakes from. → bolometric correction, → correcting plate, → correction, → corrector, → ionization correction factor, → K correction, → Malmquist correction, → Rydberg correction, → wavefront correction.

From L. correctus, p.p. of corrigere "make straight, put right," from → com- intens. prefix + regere "to guide, direct, rule," cf. Av. raz- "to direct, lead," razišta- "straightest, most correct," erezu- "correct, straight," râzayeiti "directs," O.Pers. râs- "to be right, straight, true," râsta- "staright, true," Mod.Pers. râst "right, straight, true," Skt. raj- "to direct, stretch," rjuyant- "walking straight," Gk. orektos "stretched out," Ger. recht, E. right; PIE base *reg- "right, just; to move in a straight line."

1) Aršâ, from Av. arš, ereš, erež "rightly, truly," as in arš.dâta- "rightly made," arš.manah- "whose thinking is right," arš.vacah- "whose speaking is right," erešya- "righteous, just," cf. O.Pers. arta- "law, justice," Skt. rta- "cosmic order," Gk. arti "just," artios "complete;" PIE base ar- "to fit together, join."

Note: For the sake of clarity, we avoid the Persian term dorost because its dominant meaning is "entire, complete, whole, safe, sound," although it means also "accurate, correct." Etymology: Mid.Pers. drust "straight, right, healthy," drôd "health, thriving," Parthian rwd "health, thriving," O.Pers. duruva- "firm, certain, immune," Av. drava- "healthy," Skt. dhruva- "fixed, firm, lasting," druh- "to be firm," Proto-Iranian *druua-.
2) Aršâyidan, verb from aršâ "correct."

correcting plate
  تیغه‌ی ِ ارشاینده، ~ ارشاگر   
tiqe-ye aršâyandé, ~ aršâgar

Fr.: lame correctrice   

A large glass plate placed at the entrance of a Schmidt telescope to correct for spherical aberration over the large field of view.

correct; → plate.

correction
  ارشایش   
aršâyeš

Fr.: correction   

1) The act or process of correcting.
2) A quantity added to a calculated or observed value to obtain the true value.
3) Something that is substituted or proposed for what is wrong or inaccurate.

Noun form of → correct.

corrector
  ارشاینده، ~ ارشاگر   
aršâyandé, ~ aršâgar

Fr.: correcteur   

A thin lens-like optical piece which removes certain optical aberrations.

correct + → -or.

correlate
  هم‌باز‌آنیدن   
hambâzânidan

Fr.: corréler   

1) To place in or bring into causal or mutual relation.
2) To have a mutual or reciprocal relation.

From co-, → com-, + relate, → relation

Hambâzânidan , from ham-com- + bâzânidanrelate.

correlation
  هم‌باز‌آنش   
hambâzâneš

Fr.: corrélation   

General: The degree to which two or more attributes or measurements on the same group of elements show a tendency to vary together; the state or relation of being correlated.
Statistics: The strength of the linear dependence between two random variables.

From M.Fr. corrélation, from cor- "together," → com- + → relation.

Hambâzâneš , from ham-com- + bâzânešrelation.

correlation coefficient
  همگر ِ هم‌باز‌آنش   
hamgar-e hambâzâneš

Fr.: coefficient de corrélation   

A number between -1 and 1 which measures the degree to which two variables are linearly related.

correlation; → coefficient.

correlator
  هم‌باز‌آن‌گر   
hambâzângar

Fr.: corrélateur   

In radio astronomy a general term for → autocorrelator and → cross-correlator.

correlate + → -or.

<< < -es -iv -ti 21 a p abe abs abs aca acc acc acr act ada adh Adr aer AGB air Alf Alg all alp alt AM amo ana And ang ani ano Ant Ant apa apo app app Ara Arc ari Arr ash ass ast ast asy atm ato att aut ave axi Bab bal Bal bar bar bea Bek Bes bia Big bin bin bip biv bla bli blu Boh Bol Bos bou bra bri bro buo cal cal can cap car Car cat cat CCD Cen cen CH cha cha che Che chr cir cir cit cla clo clo clu Coa coe coh col col col com com com com com com com com Com con con con con con con con con con con con con Cop Cor cor cor cos cos cou cou Cow cre cri cro cry cur cya Cyg dan dar dat de- deb dec dec ded def deg del dem den dep des det dev dia dif dif dih dio Dir dis dis dis dis dis dis DO don dou dow dro dur dwa dyn Dys ear ebb ecl edg egg Ein Ela ele ele ele ele ell eme emp enc eng ent epi equ equ equ esc eth Eur Eve exa exc exe exi exp exp ext ext ext fac fal far fed Fer fer fie fin fir fis fla flo flu fol for for fou fra fre Fre fro fut G-t gal gal gam gas Gau Gem gen geo geo geo gia Gli Gol gra gra gra gra gre gri gui H I Hag hal har hat He- hea hel Hel her Hes hie hig his hom hor hot Hub Hug hur hyd hyd hyg hyp ice ide ima Ima imp imp inc inc ind ine inf inf inf ing inn ins ins int int int int int int int int inv Io ion iro isl iso iso Jac jet jud jur Kel Kep kil Klo Kui Lag lam Lap Lar lat law lea len lep Lib lig lim lin lin Lio lit loc LOF lon Lor low lum lun Lup Lyo mac mag mag mag mag mag mai man Mar mas mas mat Max mea mec Meg Mer Mer met met Met mic Mid Mil min Mir mit mod mod mol mon Mor mou mul mul mys nan Nat nau nec neo neu nev New NGC no nom non non nor not nuc nuc num nut obj obs obs occ ocu oft ome Oor ope opp opt opt orb ord ori ort osc out ove oxi pai pan par par par par pas pea pen per per per per Per per pha phi pho pho pho phy pio Pla pla pla pla Pla plu Poi pol pol pol poo pos pos pot pra pre pre pre pre pri pri pro pro pro pro pro Pro pro pse pul pur qua qua qua qua que rac rad rad rad rad rad rad ran rar ray rea rea rec rec red red ref ref reg rel rel rel ren res res res res ret rev Ric rig rin roc roo rot rot Rus Sac sal sat sca sca Sch sci Scu sec sec Sed sel Sel sen ser Sex Sha she sho sid sig sil sim sin siz sla Sma sno sof sol sol sol sol sou sou spa spa spe spe spe sph spi spi spr squ sta sta sta sta ste ste ste Sto Str str str sub sub suc sun sup sup sup sup sur swa syn syn tab tar tek tem ter tes the the the the Tho thr tid tim Tis Too Tor tra tra Tra tra tra tri tri tru Tul tur two Typ ult un- und uni uni unk upp Urc utt val var vec vel ver vib vio vir vis voi vor wan wat wav wax wea Wei whi Wil win WN9 wor X-r yel you zer zod > >>