An Etymological Dictionary of Astronomy and Astrophysics

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory



Number of Results: 13 Search : map
bijective mapping
  همتایش ِ دوشانی   
hamtâyeš-e došâni

Fr.: application bijective   

Same as → bijection.

bijective; → mapping.

concept map
  نقشه‌ی ِ بگرتی   
naqše-ye begerti

Fr.: schéma conceptuel   

A chart showing a central concept with suggested relationships with other concepts, which are subtopics of the central concept. The map is ordered into a tree structure with multiple branches.

concept; → map.

conformal mapping
  همتایش ِ همدیس   
hamtâyeš-e hamdis

Fr.: application conforme   

A continuous mapping u = f(x) of a domain D in an n-dimensional Euclidean space (n≥ 2) into the n-dimensional Euclidean space is called conformal at a point x0D if it has the properties of constancy of dilation and preservation of angles at this point.

conformal; → mapping.

contour map
  نقشه‌ی ِ پربندی   
naqše-ye parbandi

Fr.: carte de contours   

A map showing the flux intensity variations over an extended object made up of → contour lines.

contour; → map.

eclipse mapping
  نقشه‌برداری ِ گرفتی   
naqše bardâri-ye gerefti

Fr.: cartographie par éclipse   

A method for imaging the continuum light distributions of the → accretion disks of → cataclysmic variable stars. It relies on geometrical information contained in eclipse light curves. An alternative method is → Doppler tomography.

eclipse; → mapping.

  ۱) نقشه؛ ۲) نقشه برداری کردن   
1) naqšé; 2) naqšé bardâri kardan

Fr.: 1) carte, plan; 2) cartographier   

1a) A representation usually on a flat surface of an area of the Earth or a portion of the sky, showing them in their respective forms, sizes, and relationships.
1b) Math.: Same as → mapping.
2) To make a map of; show or establish the features of, details of.

Shortening of M.E. mapemounde "map of the world," from M.L. mappa mundi "map of the world," first element from L. mappa "napkin, cloth" (said to be of Punic origin) + L. mundi "of the world," from mundus "universe, world."

Naqšé "map," from naqš "painting, embroidering, carving," variant of negâštan, negâridan "to paint," negâr "picture, figure," → graph.

map projection
  فراشانش ِ نقشه‌نگاری   
farâšâneš-e naqšenegâri

Fr.: projection cartographique   

The theory and method of transforming the features, geometry, and topology on a sphere surface (in particular the spherical Earth) onto a plane.

map; → projection.

afrâ (#)

Fr.: érable   

Any tree of the genus Acer. The maple leaf is an emblem of Canada.

M.E. mapel, O.E. mapul-, related to O.N. möpurr, O.S. mapulder, M.L.G. mapeldorn.

Afrâ, of Tabari origin.

  ۱) نقشه‌برداری؛ ۲) همتایش   
1) naqšé bardâri; 2) hamtâyeš

Fr.: 1) cartographie; 2) application   

1) The process of producing a map.
2) Math.: The operation of establishing → relations between two → sets in which one element of the second set is assigned to each element of the first set, as the expression y = x2. Same as → function.

Verbal noun from → map + → -ing.

1) Naqšé bardâri;, → map.
2) Hamtâyeš, verbal noun of hamtâyidan literally "folding together, relating units together," from ham- "together," → com-, + "fold, plait, ply; piece, part; single, a single unit of a pair," also a multiplicative suffix; Mid.Pers. tâg "piece, part," + infinitive suffix -idan.


Fr.: plasmapause   

The sharp outer boundary of the plasmasphere, at which the plasma density decreases by a factor of 100 or more.

plasma + pause "break, cessation, stop," from M.Fr. pause, from L. pausa "a halt, stop, cessation," from Gk. pausis "stopping, ceasing," from pauein "to stop, to cause to cease."

plasma + marz "frontier, border, boundary," from Mid.Pers. marz "boundary;" Av. marəza- "border, district," marəz- "to rub, wipe;" Mod.Pers. parmâs "contact, touching" (→ contact), mâl-, mâlidan "to rub;" PIE base *merg- "boundary, border;" cf. L. margo "edge" (Fr. marge "margin"); P.Gmc. *marko; Ger. Mark; E. mark, margin.

surjective mapping
  همتایش ِ برشانی   
hamtâyeš-e baršâni

Fr.: application surjective   

Same as → surjection.

surjective; → mapping.

synoptic map
  نقشه‌ی ِ هنوینی   
naqše-ye hanvini

Fr.: carte synoptique   

1) Sun: A map that displays positions of certain events (e.g., → sunspots, → faculae, → filaments, etc.) observed during one solar rotation.
2) Meteorology: The use of data obtained simultaneously over a wide area for the purpose of presenting a comprehensive and nearly instantaneous picture of the state of the atmosphere.

synoptic; → map.

Wilkinson Microwave Anisotropy Probe (WMAP)

Fr.: WMAP   

A space telescope launched by NASA in 2001 which measures the temperature fluctuations in the → cosmic microwave background (CMB) radiation. It creates a full-sky map of the CMB, with a 13 arcminute resolution via multi-frequency observations. WMAP is the first mission to use a → Lagrangian point L2 as its permanent observing station at a distance of 1.5 million km. WMAP completed its prime two years of mission operations in September 2003 and is continuing in 2009 its observations for still several years to come. WMAP's measurements have played a considerable role in establishing the current standard model of cosmology. They are consistent with a Universe that is dominated by → dark energy, with negative pressure or a → cosmological constant. In this model, the age of the Universe is 13.73 ± 0.12 billion years. The current expansion rate of the Universe measured by the Hubble constant, is 70.5 ± 1.3 km·s-1 Mpc-1. The content of the Universe consists of 4.56% ± 0.15% ordinary → baryonic matter, 22.8% ± 1.3% → cold dark matter, and 72.6% ± 1.5% of → dark energy, that accelerates the → expansion of the Universe.

WMAP, short for Wilkinson Microwave Anisotropy Probe, in honor of David Todd Wilkinson (1935-2002), who had been a member of the mission's science team.