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: 603
interpretation
  آزند، آزندش   
âznad, âzandeš

Fr.: interprétation   

1) The act of interpreting; elucidation; explication.
2) Physics: Providing relations between the mathematical symbols of a → formalism and physical → observables. → Copenhagen Interpretation.

Verbal noun of → interpret.

intersect
  اندربریدن، اندرسکنجیدن   
andarboridan, andarsekanjidan

Fr.: couper, croiser; intersecter   

To cut or divide by passing through or across: a comet intersecting Earth's orbit.
Geometry: Of lines, to meet and cross at a point.

From L. intersectus, p.p. of intersecarer, from → inter- + secare "to cut."

Andarboridan, from andar-, → inter-, + boridan "to cut," from Mid.Pers. britan, brinitan "to cut off;" Av. brāy-, present tense brin-, only with suffix pairi-, "to cut off;" cf. Skt. bhri- "to hurt, injure," bhrinanti "they hurt."
Andarsekanjidan, from andar-, → inter-, + sekanjidan [Dehxodâ] "to cut, scrape, pare;" Mid.Pers. škastan, škenn- "to break," Mod.Pers. šekastan "to beak, split," present stem šekan-; Av. scind-, scand "to beak, cleave;" Proto-Iranian *skand- "to beak, cleave;" PIE sken- "to cut off."

intersection
  اندربرش، اندرسکنج   
andarboreš, andarsekanj

Fr.: intersection   

The act, process, or result of intersecting.
Math.: A set of elements common to sets A and B, denoted by A ∩ B. → section.

Verbal noun of → intersect.

interstellar
  اندر-اختری   
andaraxtari

Fr.: interstellaire   

Referring to the medium or objects lying in the space between stars in our Galaxy or outer galaxies.

inter- + → stellar.

interstellar absorption
  درشم ِ اندر-اختری   
daršam-e andaraxtari

Fr.: absorption interstellaire   

The absorption of light from stars and other objects by intervening gas and dust in interstellar space.

interstellar; → absorption.

interstellar bubble
  تنگل ِ اندر-اختری، حباب ِ ~   
tangol-e andaraxtari, hobâb-e ~

Fr.: bulle interstellaire   

A huge structure of ionized gas blown into the interstellar medium by the winds of supernovae and massive stars. → Local Bubble.

interstellar; → bubble.

interstellar cloud
  ابر ِ اندر‌اختری   
abr-e andaraxtari

Fr.: nuage interstellaire   

An aggregation of gas and dust in the → interstellar medium containing large quantities of atoms, molecules, and dust. There are several types of interstellar clouds, such as → diffuse interstellar clouds, → dark clouds, → molecular clouds.

diffuse; → cloud.

interstellar dust
  غبار ِ اندر-اختری   
qobâr-e andaraxtari

Fr.: poussière interstellaire   

An aggregation of → dust grains in the space between stars. Interstellar dust absorbs, scatters, and polarizes the light from distant stars, causing the → interstellar extinction. Large dark regions in the plane of the Milky Way and other galaxies are caused by → intervening clouds of dust. The conclusive proof for the presence of a general and selective interstellar absorption is due to R. J. Trumpler (1930). See also → reddening; → very small grain; → big grain; → PAH.

interstellar; → dust.

interstellar dust grain
  دانه‌ی ِ غبار ِ اندر‌اختری   
dâne-ye qobâr-e andaraxtari

Fr.: grain de poussière interstellaire   

dust grain.

interstellar; → dust; → grain.

interstellar extinction
  خاموشی ِ اندر-اختری   
xâmuši-ye andaraxtari

Fr.: extinction interstellaire   

The dimming of light traveling in the interstellar space due to the combined effects of absorption and scattering by interstellar dust particles. Interstellar extinction increases at shorter (bluer) wavelengths, resulting in → interstellar reddening.

interstellar; → extinction.

interstellar gas
  گاز ِ اندر-اختری   
gâz-e andaraxtari

Fr.: gaz interstellaire   

Gas, mostly hydrogen, in the interstellar space found in a variety of forms: molecular, atomic, ionized, plasma.

interstellar; → gas.

interstellar grain
  دانه‌ی ِ اندر-اختری   
dâne-ye andaraxtari

Fr.: grain interstellaire   

Irregularly shaped → dust grains that occur in the → interstellar medium. They are mostly composed of carbon and/or silicates and measure a fraction of micron across.

interstellar; → grains.

interstellar line
  خطّ ِ اندر-اختری   
xatt-e andaraxtari

Fr.: raie interstellaire   

A spectral line formed in the interstellar medium, in particular an absorption line which does not participate in the periodic Doppler shift of intrinsic absorption lines in a binary star.

interstellar; → line.

interstellar magnetic field
  میدان ِ مغناتیسی ِ اندر-اختری   
meydân-e meqnâtisi-ye andaraxtari

Fr.: champ magnétique interstellaire   

A large-scale, weak magnetic field, with an estimated strength of about 1 to 5 microgauss, that pervades the disk of the Milky Way Galaxy and controls the alignment of interstellar dust grains.

interstellar; → magnetic; → field.

interstellar maser
  میزر ِ اندر-اختری   
meyzer-e andaraxtari

Fr.: maser interstellaire   

A maser phenomenon created by young stars and → protostars in the surrounding dense → molecular clouds of gas and dust. See also → circumstellar maser; → ammonia maser; → methanol maser; → OH maser; → water maser.

interstellar; → maser.

interstellar matter
  مادّه‌ی ِ اندر-اختری   
mâdde-ye andaraxtari

Fr.: matière interstellaire   

The gas and dust that exists in open space between the stars. See also → interstellar medium.

interstellar; → matter.

interstellar medium (ISM)
  مدیم ِ اندر-اختری   
madim-e andaraxtari

Fr.: milieu interstellaire   

The environment containing the → interstellar matter, consisting of gas (mostly hydrogen) and dust. Even at its densest phase, the interstellar medium is emptier than the best vacuum man can create in the laboratory, but because space is so vast, the interstellar medium still adds up to a huge amount of mass.

interstellar; → medium.

interstellar molecule
  مولکول ِ اندر-اختری   
molekul-e andaraxtari

Fr.: molécule interstellaire   

Any molecule that occurs naturally in clouds of gas and dust in the interstellar medium. So far more than 140 species have been discovered, many of which nonexistent on Earth.

interstellar; → molecule.

interstellar polarization
  قطبش ِ اندر-اختری   
qotbeš-e andaraxtari

Fr.: polarisation interstellaire   

The polarization of starlight caused by aligned → interstellar grains, so that initially → unpolarized light from a star is partially polarized by the time it reaches the Earth.

interstellar; → polarization.

interstellar radiation field
  میدان ِ تابش ِ اندر-اختری   
meydân-e tâbeš andaraxtari

Fr.: champ de rayonnement interstellaire   

A global ionizing radiation in the → interstellar medium provided by various sources all together.

interstellar; → radiation; → field.

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