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: 13116 Search : far
aeronomy
  وای‌شناسی، فرازاجوشناخت   
vâyšenâsi, farâzâjavvšenâxt

Fr.: aéronomie   

The study of the upper atmosphere, especially of regions of ionized gas.

From Gk. aer- "weather" + nomos "arranging, regulating," related to nemein "to deal out."

Vâyšenâsi from Mid. Pers./Mod. Pers. vây "weather," Av. vayah-, vaya- "weather, atmosphere," from va- "to blow;" cf. Skt. va-; Gk. aemi "to blow;" Av. vāta- "wind;" Skt. vata-; L. ventus, Mod. Pers. bâd, → wind; PIE *we- "to blow".

aerosol
  هوالو   
havâlu

Fr.: aérosol   

A suspension of fine solid or liquid particles in a gas.

Aerosol from aero "air" + sol(ution).

Havâlu from havâ "weather" + lu from → luyé, luyeš, → solution.

aesthetic
  زیباییک، زیبایی‌شناختی، زیبا   
zibâyik, zibâyi-šenâxti, zibâ

Fr.: esthétique   

Relating to the philosophy of → aesthetics.

Adjective from → aesthetics.

aesthetics
  زیباییک، زیبایی‌شناسی   
zibâyik (#), zibâyi-šenâsi

Fr.: esthétique   

1) The branch of philosophy dealing with such notions as the beautiful, the ugly, the sublime, the comic, etc., as applicable to the fine arts, with a view to establishing the meaning and validity of critical judgments concerning works of art, and the principles underlying or justifying such judgments.
2) The study of the mind and emotions in relation to the sense of beauty (Dictionary.com).

From Ger. Ästhetisch or Fr. esthétique, both from Gk. aisthetikos "sensitive, perceptive," from aisthanesthai "to perceive, to feel."

Zibâyik, from zibâ "beautiful, elegant, adorned," → beauty, + -ik, → -ics.

affine
  کروَن   
karvan

Fr.: affine   

Math.: Of or pertaining to the geometry of → affine transformations. See also: → affine combination, → affine geometry, → affine set, → affinity.

From Fr., from L. affinis "bordering on; neighboring; related."

Karvan, literally "bordering on; possessing border (with); related," from (Bašgard) ker "border, boundary," (Fin Bandar Abbas) karaq "border, edge;" classical Pers. karân, kenâr "boundary, side, edge;" + -van suffix of possession, relation.

affine combination
  میازش ِ کروَن   
miyâzeš-e karvan

Fr.: combinaison affine   

A linear combination of vectors in which all the vector coefficients add up to one.

affine; → combination.

affine geometry
  هندسه‌ی ِ کروَن   
hendese-ye karvan

Fr.: géométrie affine   

The study of the properties which are → invariant under → affine transformations.

affine; → geometry.

affine set
  هنگرد ِ کروَن   
hangard-e karvan

Fr.: ensemble affine   

A set → if and only if (iff) for any two points in the → set, the line through them is contained in the set. In other words, for any two points in the set, their → affine combinations are in the set itself.

affine; → set.

affine transformation
  ترادیس ِ کروَن   
tarâdis-e karvan

Fr.: transformation affine   

Any → transformation preserving → collinearity.

affine; → transformation.

affinity
  کروَنی   
karvani

Fr.: affinité   

1) General: A relationship or resemblance.
2) Math.: The state, quality, or fact of being → affine.

affine; → -ity.

affirm
  بردشیدن   
bardešidan

Fr.: affirmer   

To state or assert positively; maintain as true.

M.E. affermen, affirmen "to decide upon; to state positively," from O.Fr. afermer "affirm, confirm; strengthen," from L. affirmare "to make steady, strengthen," from → ad- "to" + firmare "strengthen, make firm," from firmus, → firm.

Baedešidan, from bar- "upon, to," + deš, → firm, + infinitive suffix -idan.

affirmation
  بردش   
bardeš

Fr.: affirmation   

The act of affirming or something affirmed.

Verbal noun of → affirm.

affix
  وند   
vand (#)

Fr.: affixe   

A linguistic element added to a word or root to produce a derived or inflected form. General term for → infix, → prefix, → suffix, and → circumfix.

From L. affixus "fastened to," p.p. of affigere "fasten to, attach," from af-, variant of → ad- "to" + figere "fasten."

Vand, variant band "tie, band," present stem of Mod.-Mid./Pers. bastan/vastan "to bind, shut;" Av./O.Pers. band- "to bind, fetter," banda- "band, tie;" cf. Skt. bandh- "to bind, tie, fasten;" PIE *bhendh- "to bind," cf. Ger. binden, E. bind.

afocal
  اکانون، بی‌کانون   
akânun, bikânun (#)

Fr.: afocal   

Describing a lens or optical system with a convergent power of zero, whose object and image points stretch to infinity. Thus, → afocal system.

Afocal, from → a- + → focal.

Akânun, from a- negation prefix, → a- + kânun, → focus. Bikânun, from bi- negation prefix + kânun, → focus.

afocal system
  راژمان ِ اکانون   
râžmân-e akânun

Fr.: système afocal   

An optical system with object and image points at infinity.

afocal; → system.

after
  پس، پسان   
pas, pasân (#)

Fr.: après   

1) Behind in place or position; following behind.
2) Later in time than; in succession to; at the close of (Dictionary.com).

M.E., from O.E. æfter "after, next, following in time," from O.E. of "off," cf. apo- + -ter a comparative suffix.

Pas "after," → back-; pasân with place/time suffix -ân.

afterglow
  پسفروز   
pasforuz

Fr.:   

1) A broad glowing arc of radiance, sometimes seen high in the western sky at → twilight, caused by the → scattering effect of → fine dust particles suspended in the → upper atmosphere.
2) Lingering → radiation that remains after a violent → event such as a → gamma-ray burst. The afterglow of any gamma-ray burst is caused by an event different from the original explosion, likely by → shock waves colliding with the ambient medium. Afterglows occur in a large range of → electromagnetic  → wavelengths.

after; → glow.

afternoon
  پس-نیمروز، پس از نیمروز   
pas-nimruz, pas az nimruz

Fr.: après-midi   

The part of day from → noon to → evening.

after; → noon.

afterward
  پسان، پسانه   
pasân, pasâne

Fr.: après, ensuite, plus tard   

At a later or subsequent time; subsequently.

after; → -ward.

AG Carinae
   AG افزل   
AG Afzal

Fr.: AG de la Carène   

A → Luminous Blue Variable star in the constellation → Carina; also known as HD 94910. AG Carinae lies about 6 kpc (20,000 → light-years) away and is surrounded by a → nebula. It is also a → spectroscopic variable, with the variability on time-scale of years. During the epochs of minimum in the visual → light curve (mV ~ 8.1), the star is relatively hot and has a → WN11 spectral type, showing strong He I, H I, and N II → emission lines, weak He II 4686 Å emission, and Si IV 4088-4116 Å absorption. During the maximum epochs of the light curve (mV ~ 6.0), the star is cooler, and the spectrum is reminiscent of extreme A-type → hypergiants, with a strong emission of H I, Fe II, and T III lines. The transition between both phases is characterized by the appearance of peculiar features in the spectrum, such as absorption-line splitting, strong → electron-scattering wings in He I and Fe II lines, and apparent → inverse P Cygni profiles in He I lines. The presence of a massive → bipolar nebula around AG Car testifies to a recent (t< 104 years) phase of high → mass loss. The morphology and kinematics of the nebula suggest a → dynamical age of 8.5 × 103 years and a high mass of → ionized nebular material (~ 4.2 Msun), which is likely composed of → ejecta from the central star. The nebular abundances show evidence of moderate nitrogen → enrichment. Properties of the → circumstellar nebula, studied in the → mid-infrared and → far-infrared, reveal an incredibly high dust mass of ~ 0.25 Msun, → dust temperature between 76 and 99 K, and the presence of large → dust grains of ~ 1 μm, as deduced from far-→ infrared excess. Assuming a normal → gas-to-dust ratio of 100, the total nebular mass of AG Car could be as high as ~ 30 Msun which would be of the order of, or even higher than, the mass of the → Homunculus nebula around → Eta Carinae. At the time when the AG Car nebula was ejected, the → interstellar bubble around the central star likely contained a negligible amount of material compared to the total mass of the nebula, implying that most of the nebular mass was ejected by the central star (Groh et al., 2009, ApJ 698, 1698).

AG, as used in the → variable star designation system; → Carina.

<< < -es -iv -ti 21 a p abe abs abs aca acc acc acr act ada adh Adr aer aga air Alf Alg alk Alp alt alu amm ana And ang ani ano ant ant Ap apo app app Aqu Arc arg arr asc ass ast ast asy atm ato att aur aut axi B-m bad Bal bar bar Bay Bed ber Bet bif bim bin bio bis bla ble blu Bod Bol bor bou Bra Bre bro bul C-t Cal Cam can car Car Cas cat cav cel cen cer Cha cha Cha che chl Cir cir cir Cla cli clo clu co- coc 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 coo Cor Cor cor cos cos cos Cou cou Cra Cre cri cro cub cur cyc cyl Dan dat Dav de- Deb dec dec dee def deg del Den den der det deu dew dic dif dif dil Dip dir dis dis dis dis dis diu dod Dop dou Dra dua dus dwa dyn DZ Ear ecc eco edi EHB Ein ela ele ele ele ele ell eme emp end Eng ent epi equ equ era ESP eth Eur evi exa exc exe exi exp exp ext ext ext fac fal far fec Fer fer fie fin fir fis fla Flo flu fog for for Fou fra fre fre Fro fun G s Gal gal gal Gar gau geg gen geo geo geo ger gla gly gra gra gra gra gra Gre gro GYR Had Hal hap Har HD hea hel hel Hen Her hex hig Hil hol Hoo hor hou Hub hum hyb hyd hyd hyp hys ide ign ima imp imp in- inc Ind ind ine inf inf inf ini ins ins ins int int int int Int int int int inv ion iri irr iso iso iso Jea Jor jum K c Kep Ker kin kno lab Lam Lan Lap las lat Le lef len lev lig lig lin lin lin liq Lit loc log lon lou LS lun lun Lym M s Mag mag mag mag mag mag maj man Mar mas mas mat May mea mec mel mer mes met met met mic mid mil Min Mir mix mod mod mol mon mor mov mul mur mys nan nat nav nec Nep neu New New NGC nob nom non non nor nos nuc nuc num nut obj obl obs occ oct off oli oni ope opp opt opt orb ord org orp osc out ove oxi P-w pal par par par par Pas pat pej per per per per per per pha Phe pho pho pho phy pin pla Pla pla pla pla plu poi pol pol Pol pol por pos pot Poy pre pre pre pre pri pri pri pro pro pro pro pro pro Psa pul pum Q i qua qua qua qua R A rad rad rad rad rad rad Ram Ran rat rea rea rec rec red red ref ref reg rei rel rel rem rep res res res ret rev Rho Rie ril riv rog Ros rot rul S A Sag sam sat sca sca Sch Sco Sec sec sec seg sel sem sen set Sha sha shi sho sid sig sim sin Sir ske sli Smo soc sof sol sol sol sol sou sou spa spe spe Spe spe sph spi Spi spr sta sta sta sta sta ste ste ste Sto str str sub sub sub suc sun sup sup sup sup sur swa syn syn tac tas tel tem ter tes the the the the thi thr tid til tip ton tor tou tra tra tra tra Tri tri tru tsu tur two Typ UHE ult unc uni uni uni upg ura uti val var vec Vel ver Ver vie Vir vis vis vol W-R war wav wav wea Wei wha wid win WN3 Wol wri xen yok zen zij > >>