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: 662
informative
  ازدامند   
azdâmand

Fr.: informatif   

Giving → information, providing information, imparting → knowledge.

From informat-, from L. informatus, from → inform + → -ive.

informer
  ازداگر   
azdâgar

Fr.: informateur   

A person who provides → information.

From → inform + -er, → -or.

infosphere
  ازداسپهر   
azdâsepehr

Fr.: infosphère   

The global network of all the world's communications, databases, and sources of information.

information; → sphere.

infra-
  فرو-   
foru-

Fr.:infra-   

A prefix meaning "below," used with second elements of any origin. → infrared; → infrasound.

From L. infra "below, underneath, beneath," from PIE *ndher; cf. Mod.Pers. zir "below, down," akin to → under-.

Foru-, from foru "down, downward; below; under, beneath; low," from Mid.Pers. frôt "down, downward;" O.Pers. fravata "forward, downward;" cf. Skt. pravát- "a sloping path, the slope of a mountain."

infrared
  فروسرخ   
forusorx (#)

Fr.: infrarouge   

The invisible part of electromagnetic spectrum possessing wavelengths between those of visible light and those of radio waves, i.e. approximately between about 0.75 and 1000 μm.

From L. infra (adv., prep.) "below, underneath, beneath," inferus "lower," from PIE *ndher; cf. Av. aδara- (adj.), aδairi- (prep.) "below;" Mid.Pers. êr "below, down; low, under," adar "low," azêr "below, under" (Mod.Pers. zir "below, down"); Skt. ádhara- "lower;" O.E. under "under, among"); → red.

Forusorx, from foru "down, downward; below; beneath;" Mid.Pers. frôt "down, downward;" O.Pers. fravata "forward, downward;" cf. Skt. pravát- "a sloping path, the slope of a mountain," + sorxred.

infrared array
  آرست ِ فروسرخ   
ârast-e forusorx

Fr.: détecteur mosaïque infrarouge   

A two-dimensional infrared imaging device, consisting of an array of small, individual electronic detectors, each of which records a pixel in the image.

infrared; → array.

Infrared Astronomical Satellite (IRAS)
  ماهواره‌ی ِ اخترشناختی ِ فروسرخ   
mâhvâre-ye axtaršenâxti-e forusorx (#)

Fr.: satellite astronomique infrarouge   

An orbiting infrared telescope (60 cm mirror) which successfully operated from launch in January 1983 until the supply of coolant ran out in November 1983. It was a collaborative mission between NASA, the Netherlands, and the UK, and mapped 95% of the whole sky in the wavelength bands 12, 25, 60, and 100 microns.

infrared; → astronomical; → satellite.

infrared astronomy
  اخترشناسی ِ فروسرخ   
axtaršenâsi-ye forusorx (#)

Fr.: astronomie infrarouge   

The study of infrared properties of astronomical objects.

infrared; → astronomy.

infrared camera
  کدک ِ فروسرخ   
kadak-e forusorx

Fr.: caméra infrarouge   

An optical camera equipped with a → detector which is sensitive to → infrared radiation.

infrared; → camera.

infrared cirrus
  سیروس ِ فروسرخ   
sirus-e forusorx (#)

Fr.: cirrus infrarouge   

Wispy, extended structures seen above and below the plane of the Galaxy in the infrared maps of the sky (60-100 microns) produced by the → Infrared Astronomical Satellite (IRAS).

infrared; L. cirrus "curl, tuft, plant filament like a tuft of hair."

infrared dark cloud (IRDC)
  ابر ِ تاریک ِ فروسرخ   
abr-e târik-e forusorx

Fr.: nuage sombre infrarouge   

A → dark cloud characterized by a → visual extinction Av≥ 102 mag. IRDCs are opaque even at 8 μm, and can be seen in silhouette against the bright diffuse → mid-infrared emission in the → interstellar medium.

infrared; → dark; → cloud.

infrared detector
  آشکارگر ِ فروسرخ   
âškârgar-e forusorx (#)

Fr.: détecteur infrarouge   

A thermal device for observing and measuring → infrared radiation.

infrared; → detector.

infrared emission
  گسیل ِ فروسرخ   
gosil-e forusorx

Fr.: émission infrarouge   

The portion of → electromagnetic radiation from → astrophysical objects in → infrared frequencies.

infrared; → emission.

infrared excess
  فزونی ِ فروسرخ، فرهبود ِ ~   
fozuni-ye forusorx, ferehbud-e ~

Fr.: excès infrarouge   

Infrared → emission from a star in excess of that expected from a → blackbody with the temperature corresponding to the temperature of the star.

infrared; → excess.

infrared galaxy
  کهکشان ِ فروسرخ   
kahkešân-e forusorx (#)

Fr.: galaxie infrarouge   

A galaxy that emits most of its energy in the infrared region of the spectrum. Such galaxies are thought to have unusually high rates of star formation and are also described as → starburst galaxies.

infrared; → galaxy.

infrared imaging
  تصویرگری ِ فروسرخ   
tasvirgari-ye forusorx (#)

Fr.: imagerie infrarouge   

Imaging with an infrared detector.

infrared; → imaging.

infrared radiation
  تابش ِ فروسرخ   
tâbeš-e forusorx (#)

Fr.: rayonnement infrarouge   

That part of the → electromagnetic radiation lying beyond the red, between the radio and the visible regions of the → electromagnetic spectrum. The wavelengths range from about 0.8 → microns (μm) to about 1000 μm. See also: → near-infrared; → mid-infrared; → far-infrared; → submillimeter radiation.

infrared; → radiation.

Infrared Space Observatory (ISO)
  نپاهشگاه ِ فضایی ِ فروسرخ   
nepâhešgâh-e fazâyi-ye forusorx

Fr.: Satellite ISO   

A European Space Agency satellite which carried the most sensitive infrared telescope ever launched. It operated between November 1995 and April 1998 and made particularly important observations of the dusty regions of the Universe. ISO was equipped with four science instruments: an infrared camera (CAM), a long-wavelength spectrometer (LWS), a photo-polarimeter (PHT), and a short-wavelength spectrometer (SWS). The instruments jointly covered wavelengths from 2.5 to around 240 microns with spatial resolutions ranging from 1.5 arcseconds to 90 arcseconds. Its 60 cm diameter telescope was cooled by superfluid liquid helium to temperatures of 2-4 K. The mission was a great technical, operational and scientific success. During its routine operational phase, ISO successfully made some 30,000 individual imaging, photometric, spectroscopic, and polarimetric observations ranging from objects in our own solar system to the most distant extragalactic sources.

infrared; → space; → observatory.

infrared survey
  بردید ِ فروسرخ   
bardid-e forusorx

Fr.: relevé infrarouge   

Observing a large area of sky (or the whole sky) in infrared wavelengths.

infrared; → survey.

infrared telescope
  دوربین ِ فروسرخ، تلسکوپ ِ ~   
durbin-e forusorx (#), teleskop-e ~ (#)

Fr.: télescope infrarouge   

A telescope capable of observing → infrared radiation from astronomical objects.

infrared; → telescope.

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