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: 13176 Search : in
moving
  جنبنده، جنبان، درجنبش، میاونده   
jonbandé, jonbân, dar jonbeš, miyâvandé

Fr.: en mouvement   

In a state of movement. → moving cluster; → moving frame.

Verbal adj. of move, → motion.

moving cluster
  خوشه‌ی ِ جنبنده   
xuše-ye jonbandé (#)

Fr.: amas en mouvement   

A group of stars dynamically associated so that they have a common motion with respect to the local standard of rest.

moving; → cluster.

moving frame
  چارچوب ِ درجنبش   
cârcub-e darjonbeš

Fr.: référentiel en mouvement   

A → frame of reference that moves relative to the observer. The moving frame may be → inertial or → non-inertial. See also → rest frame.

moving; → frame.

moving group
  گروه ِ جنبنده   
goruh-e jonbandé

Fr.: groupe mobile   

A young → stellar population that shares a common space motion. A moving group remains kinematically distinct within the general field stars at ages < 1 billion years, before being dispersed. As progenitor gas is cleared by OB star winds, and the natal cluster expands, stars with sufficiently high velocities become unbound and form a young, coeval moving group, possibly leaving behind a bound open cluster. Because of their common origin, moving group members have a shared age and composition. The nearest moving group is the → TW Hydrae association.

moving; → group.

MRN dust model
  مدل ِ MRN   
model-e MRN

Fr.: modèle MRN   

A model concerned with the distribution in size of → interstellar grains to account for observations of → interstellar extinction from 0.11 μm to 1.0 μm. The → distribution has the form N(a)da ∝ a-3.5da, where a is the grain radius. It extends from 5 nm to 1 μm for → graphite and over a narrower range for other materials.

MNR, the initials of authors J. S. Mathis, W. Rumpl, and K. H. Nordsiek (1977, ApJ 217, 425), who introduced the mode; → dust; → model.

Mu Cephei
  مو-کفءوس   
μ Kefeus

Fr.: μ Cephei   

A → red supergiant star in the → constellation → Cepheus. It is one of the largest and most luminous stars known in the → Milky Way. μ Cephei appears garnet red and is given the → spectral type of M2 Ia. The star may even be the largest star visible to the → naked eye with an estimated radius of 1.15 billion kilometres. If it replaced the Sun, it would extend beyond the orbit of Saturn. Some of its → physical parameters are: mass = 15 Msol; → radius = 1650 Rsol; → luminosity = 60 x 104 Lsol; → effective temperature = 3690 K. Also called Herschel's → Garnet star.

Cephei, genitive of → Cepheus.

mule
  استر   
astar (#)

Fr.: mulet   

The → sterile offspring of a female horse and a male donkey.

M.E., from O.E. mul, from O.Fr. mul "mule, hinny," from L. mulus "a mule," probably from a pre-Latin Mediterranean language.

Astar, from Mid.Pers. astar, ultimately from *asa-tara-, literally "horse related," from *asa- variant of aspa-, → horse, + -tara- a suffix of relation and comparative adjectives; cf. Skt. asvátara- "mule."

multi-
  بس-   
bas- (#)

Fr.: multi-   

A combining form meaning "many, much, multiple, many times, more than one, more than two, composed of many like parts, in many respects."

From L. multus "much, many," from PIE base *mel- "strong, great, numerous;" cf. L. melior "better," Gk. mala "very, very much."

Bas-, from bas "many, much;" Mid.Pers. vas "many, much;" O.Pers. vasiy "at will, greatly, utterly;" Av. varəmi "I wish," vasô, vasə "at one's pleasure or will," from vas- "to will, desire, wish."

multi-object spectroscopy
  بیناب‌نمایی ِ بس‌-بر‌آختی   
binâbnamâyi-ye bas-barxâti

Fr.: spectroscopie multi-objets   

A technique of spectroscopy using fiber optics whereby several objects distributed over the field of view can be observed simultaneously.

multi-; → object; → spectroscopy.

multidisciplinary
  بس-هاوشانی، بس-هاوشان‌مندی   
bas-hâvešâni, bas-hâvešânmand

Fr.: multidisciplinaire   

Of an approach or study that juxtaposes disciplinary perspectives, adding breadth and available knowledge, information, and methods. The involved disciplines speak as separate voices in encyclopedic alignment. The status quo is not interrogated, and disciplinary elements retain their original identity. See also → interdisciplinary and → transdisciplinary (Thompson Klein, J. 2010, Creating Interdisciplinary Campus Culture, John Wiley and Sons, Inc.).

multi-; → disciplinary.

multiplanet system
  راژمان ِ بس-سیاره‌ای   
râžmân-e bas-sayâre-yi

Fr.: système multi-planète   

A stellar system with more than one orbiting planet.

multi-; → planet; → system.

multiple
  بستا، بستایی   
bastâ, bastâyi

Fr.: multiple   

Consisting of, having, or involving several or many individuals, parts, elements, etc.
Math.: A number that contains another number an integral number of times without a remainder: 25 is a multiple of 5.

From Fr. multiple, from L.L. multiplus "manifold," from L. → multi- "many, much" + -plus "fold," from base of plicare "to fold, twist."

Bastâ-, from bas "many, much" (Mid.Pers. vas "many, much;" O.Pers. vasiy "at will, greatly, utterly;" Av. varəmi "I wish," vasô, vasə "at one's pleasure or will," from vas- "to will, desire, wish") + "fold, plait, ply; piece, part," also a multiplicative suffix; Mid.Pers. tâg "piece, part."

multiple exposures
  نورداد ِ بستایی   
nurdâd-e bastâyi

Fr.: poses multiples   

The division of a relatively long exposure into several successive shorter ones, e.g. to avoid detector saturation.

multiple; → exposure.

multiple integral
  درستال ِ بستایی   
dorostâl-e bastâyi

Fr.: intégrale multiple   

A series of successive integrations in which the integral operator acts on the result of preceding integration.

multiple; → integral.

multiple scattering
  پراکنش ِ بستایی   
parâkaneš-e bastâyi

Fr.: diffusion multiple   

A process of → radiative transfer in which more than one → scattering event may be of importance before → transmission, → reflection, or → absorption. In → radiation-driven winds photon scattering can take place in different → spectral lines. Each scattering occurs in a different spectral line, and successive scatterings occur at lower energies (longer wavelength). The standard theory of line driving (→ CAK model) assumes that photons can be scattered only once in the wind, which is a reasonable assumption for normal → O stars. In → Wolf-Rayet stars, where photons evolve in an atmosphere with a strong → ionization stratification, multiple scattering is important. Indeed the strength of W-R winds appears to exceed the single scattering limit.

multiple; → scattering.

multiple star
  ستاره‌ی ِ بستایی   
setâre-ye bastâyi

Fr.: étoile multiple   

A star which appears single but is in fact composed of more than two components. See also → multiple star system; → binary star; → triple star.

multiple; → star.

multiple star system
  راژمان ِ بستایی   
râšmân-e bastâyi

Fr.: système multiple   

A stellar system composed of several stars bound together by gravitational attraction and revolving around a common center of mass.

multiple; → star; → system.

multiple system
  راژمان ِ بستایی   
râžmân-e bastâyi

Fr.: système multiple   

1) A system consisting of several → components.
2) → multiple star system.

multiple; → system.

multiplet
  بستایه   
bastâyé

Fr.: multiplet   

A group of spectral lines arising from transitions having a common lower energy level.

From → multi- + -plet on the model of triplet.

Bastâyé, from bastâ-multi- + euphonic -yé, from nuance suffix.

multiplicand
  بستاشو   
bastâšow

Fr.: multiplicande   

A number to be multiplied by another.

From L. multiplicandum, from multiplicandus "to be multiplied," gerundive of multiplicare, → multiply.

Bastâšow, literally "that undergoes multiplication," from bastâ, → multiple, + šow, present stem and agent noun of šodan "to become, to be, to be doing, to go, to pass," from Mid.Pers. šudan, šaw- "to go;" Av. šiyav-, š(ii)auu- "to move, go," šiyavati "goes," šyaoθna- "activity; action; doing, working;" O.Pers. šiyav- "to go forth, set," ašiyavam "I set forth;" cf. Skt. cyu- "to move to and fro, shake about; to stir," cyávate "stirs himself, goes;" Gk. kinein "to move;" Goth. haitan "call, be called;" O.E. hatan "command, call;" PIE base *kei- "to move to and fro."

<< < -es -it -sc 201 951 abe abs abs aca acc acc aco act ada adh ado aer aft air Alf alg alk alp Alt alt amb ana And ang ani ann ant ant ant apo app app Apu arc arg Arn art ass ast ast ast atm ato att aur aut avo azi bac bal bar bar bat Bea Bel bet bia big bin bio Bir bla bla blo Blu bol Boo bou box bre Bri bro bur cal cal Can cap car Car cat cau cel cen cen cha Cha cha che Chi chr cir cir civ cla clo clo CMB 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 coo cor cor cor Cos cos cos cou cou cra cri cro cry cul cur cyc D l dar dat day dea dec dec dec def def deg Del Den dep der det deu dew dic dif dif dil dip dir dis dis dis dis dis diu dog Dop dou Dra Dsc dus dwa dyn Dys Ear ecc eco edg egg Ein Ela ele ele ele ele ell eme emp enc eng ent epi equ equ equ eru eth Eur eve exa exc exe exi exo exp ext ext ext fab fai Fan fea fem fer fie fil fir fir fla fli flu foc for for for fra fre fre fri fun fuz gal gal gal Gam gau Gau gen geo geo geo geo Gib glo gov gra gra gra gra gre gro Gui H-a hal Ham har Hay hea hei hel Hel her het hie hig hoa hom hor hot Hub Hug hur hyd hyd hyl 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 inv ion iro Isl iso iso Jab jet Jov Jup Kar Kep kil Kip Kra Lag Lam Lan Lar las law lea Leg Leo lev lig lim lin lin lin lit loc loc log Lor low lum lun lun Lym Mac mag mag mag mag mag mai Mal map mas mas mat Mau mea mea med Men mer Mes Met met mic mic Mie mil min Mir mix mod mol mom Moo mor mov mul mur n-b nan nat nea neg Ner neu new New NGC noc nom non non nor nor nuc nuc nul nut obj obl obs occ oct off old one ope opp opt opt orb ord org Ori osc oth ove Owl P-s Pal par par par par Pas pat pec pen per per per per per Pha pha pho pho pho phy pie pix Pla pla pla pla Pli Poi pol pol pol pol por pos pos pow pre pre pre pre pri pri pri pro pro pro pro pro pro pro pub pul pyc qua qua qua qua qui rad rad rad rad rad rad rai 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 rur S5- Sal sat sca sca Sch sci Scu sec sec sed sel sel sem seq set sha she sho sid sie sil sim sin sit sky slo sno sod sol sol sol sol son sou spa spa spe spe spe spe sph spi spo squ sta sta sta sta ste ste ste Sti sto str str sub sub sub sul sup sup sup sup sur sur syl syn sys tal Tay tel ten ter tex the the the the Tho thr tid tim Tit too Tor tra tra Tra tra Tra tri Tri tru tub tur two Typ ult ult unc uni uni uni upl 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 > >>