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: 12948 Search : far
geocentric cosmology
  کیهان‌شناسی ِ زمین‌مرکزی   
keyhân-šenâsi-ye zamin-markazi (#)

Fr.: cosmologie géocentrique   

A model of the Universe in which the Earth is centrally located and the Sun, planets, and stars revolve around the Earth.

geocentric; → cosmology.

geocentric latitude
  ورونای ِ زمین-مرکزی   
varunâ-ye zamin-markazi

Fr.: latitude géocentrique   

The angle between the geocentric location vector and the → geodetic equator.

geocentric; → latitude.

geocentric longitude
  درژنای ِ زمین-مرکزی   
derežnâ-ye zamin-markazi

Fr.: longitude géocentrique   

The same as → geodetic longitude.

geocentric; → longitude.

geocentric parallax
  دیدگشت ِ زمین‌مرکزی   
didgašt-e zamin-markazi

Fr.: parallaxe géocentrique   

The difference between the direction of an object as seen from a point on the surface of the Earth and the direction in which it would be seen from the Earth's center. Also known as → diurnal parallax.

geocentric; → parallax.

geocentric system
  راژمان ِ زمین‌مرکزی   
râžmân-e zamin-markazi

Fr.: système géocentrique   

An ancient model of the Universe whereby all the celestial bodies travel around the Earth in circular orbits. Eudoxus of Cnidus (c. 390- c. 337 BC), one of Plato's pupils, maintained that all objects in the sky are attached to moving crystalline spheres, with the Earth at the centre. This model is often named → Ptolemaic system after its most famous supporter, the Greco-Roman astronomer Ptolemy.

geocentric; → system.

geochemical
  زمین-شیمیک، زمین-شیمیایی   
zamin-šimik, zamin-šimiyâyi

Fr.: géochimique   

Of or relating to → geochemistry.

geochemistry; → -al.

geochemistry
  زمین-شیمی   
zamin-šimi

Fr.: géochimie   

A field of science that is concerned with the relative abundance, distribution, and the movement of → chemical elements in the → Earth's crust or other → solar system objects.

geo-; → chemistry.

geocorona
  زمین‌تاج   
zamin-tâj (#)

Fr.: géocouronne   

The outermost part of Earth's atmosphere, a tenuous halo of hydrogen and some helium extending out to perhaps 15 Earth radii, which emits Lyman-alpha radiation when it is bombarded by sunlight.

From → geo- + → corona.

geodesic
  کهین‌ره، زمین‌سنجیک   
kehinrah, zamin-sanjik

Fr.: géodésique   

1) The shortest distance between two points in space (or → space-time). A geodesic on a sphere is an → arc of a → great circle. In the theory of → general relativity, freely falling bodies follow geodesic paths in space-time.
2) → geodetic.

From Fr. géodésique, → geodesy; → -ic.

Kehinrah "shortest path," from kehin, superlative of keh "small, little, slender" (related to kâstan, kâhidan "to decrease, lessen, diminish," from Mid.Pers. kâhitan, kâstan, kâhênitan "to decrease, diminish, lessen;" Av. kasu- "small, little;" Proto-Iranian *kas- "to be small, diminish, lessen") + râh "path, way, road" (from Mid.Pers. râh, râs "way, street," also rah, ras "chariot;" from Proto-Iranian *rāθa-; cf. Av. raθa- "chariot;" Skt. rátha- "car, chariot," rathyā- "road;" L. rota "wheel," rotare "to revolve, roll;" Lith. ratas "wheel;" O.H.G. rad; Ger. Rad; Du. rad; O.Ir. roth; PIE base *roto- "to run, to turn, to roll").

geodesic line
  خط ِ کهین‌ره   
xatt-e kehinrah

Fr.: ligne géodésique   

The shortest line between two points on a surface. Also called → geodesic.

geodesic; → line.

geodesic precession
  پیشایان ِ کهین‌رهی   
pišâyân-e kehinrahi

Fr.: précession géodésique   

geodesic precession.

geodesic; → precession

geodesy
  زمین‌سنجی   
zamin-sanji (#)

Fr.: géodésie   

The study and measurement of the shape, size, and curvature of the Earth.

From Fr. géodésie, from Gk. geodaisia, from → geo- + dai(ein) "to divide" + -sia, variant of -ia a noun suffix.

Zamin-sanji, from zamin, → geo-, + sanji, from sanjidan "to measure; to compare," from Mid.Pers. sanjidan "to weigh," from present tense stem sanj-, Av. θanj- "to draw, pull;" Proto-Iranian *θanj-. Other terms from this base in Pers.: lanjidan "to pull up," hanjidan, âhanjidan "to draw out," farhang "education, culture."

geodesy satellite
  ماهواره‌ی ِ زمین‌سنجی، ~ زمین‌سنجیک   
mâhvâre-ye zamin-sanji, ~ zamin-sanjik

Fr.: satellite géodésique   

A type of Earth observing satellite used to measure the location of points on Earth's surface with great accuracy. Their observations help determine the exact size and shape of Earth, act as references for mapping, and track movements of Earth's crust.

geodesy; → satellite

geodetic
  زمین‌سنجیک   
zamin-sanjik

Fr.: géodésique   

Of, relating to, or determined by → geodesy.

geodesy; → -ic.

geodetic coordinates
  هماراهای ِ زمین‌سنجیک   
hamârâhâ-ye zamin-sanjik

Fr.: coordonnées géodésiques   

A → coordinate system, composed of → geodetic latitude and → geodetic longitude on the → Earth's surface which is dependent on the figure and size of a particular model for the Earth's surface.

geodetic; → coordinate.

geodetic datum
  داده‌بن ِ زمین‌سنجیک   
dâdebon-e zamin-sanjik

Fr.: donnée géodésique   

Any of the adopted values of → geodetic latitude, → geodetic longitude, or → azimuth at a selected location (an initial station) whose astronomical coordinates have already been determined.

geodetic; → datum.

geodetic equator
  هموگار ِ زمین‌سنجیک   
hamugâr-e zamin-sanjik

Fr.: équateur géodésique   

The plane swept out as the generating ellipse of the → reference ellipsoid rotates about its minor axis.

geodetic; → equator.

geodetic latitude
  ورونای ِ زمین‌سنجیک   
varunâ-ye zamin-sanjik

Fr.: latitude géodésique   

The → acute angle between the → geodetic vertical and the → geodetic equator.

geodetic; → latitude.

geodetic longitude
  درژنای ِ زمین‌سنجیک   
derežnâ-ye zamin-sanjik

Fr.: longitude géodésique   

The angle between the plane of the → geodetic meridian and the plane of of the geodetic meridian through the site of the → Airy transit circle at the Royal Greenwich Observatory.

geodetic; → longitude.

geodetic meridian
  نیمروزان ِ زمین‌سنجیک   
nimruzân-e zamin-sanjik

Fr.: méridien géodésique   

The → ellipse through the point in question which passes through the → geodetic poles.

geodetic; → meridian.

<< < -es -iv -ti 21- A r abe abs abs acc acc acc act act ada adi adu aff age alc Alf ali all alp alt ama amp ana ang ang ann ano ant ant ape apo app aps arc Arg ari art ass ast ast ast atm ato att aur aut axi B r bac Bal Bar Bar Bay bec Ber Bet Bie bij bin bio bis bla bla blu blu bol Bor bou Bra bre bro Bug C-s cal Cam can car Car Cas cat cav cel cen cer Cha cha cha che cho cir cir cir 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 coo cor cor cor cos cos cos Cou cou Cra Cre cri cro cub cur cyc cyl dar dat daw de- Deb dec dec dee def deg del Den dep der det deu dew dic dif dif dil dip dir dis dis dis dis dis div dog Dop dou dra dua dus dwa dyn e-m ear ecl eco eff ein Ein elb ele ele ele ele Els emi emp ene enr env epi equ equ Eri est Euc eva evo exc exc exh exo exp exp ext ext f-n Fah fam fau fee Fer fib fil fin fir fix fle flu foc for for for fra fre fre fri fun fuz gal gal gal Gan gau GCN gen geo geo geo geo Gl glo gra gra gra gra gra gre gro GW1 hab hal han HAR haz hea hel hel Hen Her heu Hig Hil hol hop hor hou Hub Hum Hyd hyd hyd hyp hys ide ign ima imp imp inc inc ind ine inf inf inf inh INP ins ins int int int int Int int int int inv ion iri irr iso iso iso Jea Jos Jun K2 Kep key kin Kol lag lam Lan lar las lav lea leg len lev lig lim lin lin lin lis lob loc log lor low lum lun lun Lym Mac mag mag mag mag mag mai Mal mar mas mas mat max mea mea mee Men mer met met met mic mid Mil min Mir mix mod mod mol mon Mor mou mul muo mys nan nat nav nec Nep neu New New NGC nob nom non non nor not nuc nuc num Nyq obj obs obs oce oen OH omn opa ope opt opt opt orb ord Ori ort osc out ove oxy pal pan par Par par par pas pea Pen per per per per per pet pha pho pho pho phy pie Pit Pla pla pla pla ple Poi pol pol pol pol pop pos pos pow pre pre pre Pre pri pri pri pro pro pro pro pro pro Pro pub pul pyr qua qua qua qua Qui rad rad rad rad rad rad ram ran rat rea rec rec rec red ref ref reg reg rel rel rem rep res res res ret rev rho Rie rim riv rol Ros rot rul S a Sah san Sat sca Sch Sch scr sec sec sec sei sel sem sep set sha she sho sid sig sil sim sin sit sky slu sno sof sol sol sol sol sou sou spa spa spe spe spe sph spi spl spr sta sta sta sta sta ste ste sti sto str str sub sub sub sug sun sup sup sup sup sur syl syn sys tal Tay tel ten ter tex the the the thi tho thu tid tim tod top tot tra tra tra tra tri tri tro tru tur twi Typ UFO ult unc uni uni uni upg ura uti val var vec vel ver ver vig vir vis voc von wak Was wav wax wea wei whi Wie win WN6 wom X-r yel you zer zod > >>