An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

   Homepage   
   


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Number of Results: 9 Search : eject
coronal mass ejection (CME)
  اشانش ِ جرم از هورتاج   
ešâneš-e jerm az hurtâj

Fr.: éjection de masse coronale   

A huge eruption of material from regions of the solar corona in which the magnetic field is closed, but which suffer an extremely energetic disruption. Over the course of several hours up to 10,000 billion kg of this material is ejected into → interplanetary space with a a speed of as high as 3000 km/s. CMEs are most spectacularly observed by a white light coronagraph located outside Earth's atmosphere. Such observations from Skylab in the early 1970's were the first to reveal this phenomenon. CME's disrupt the flow of the → solar wind and can produce intense electromagnetic disturbances that can severely damage satellites and disrupt power grids on Earth. When these ejections reach the Earth, they give rise to → geomagnetic storms. The frequency varies with the → solar cycle; during solar minimum they come at a rate of about one per week, and during maximum there is an average of about two or three per day. See also → interplanetary coronal mass ejections (ICME).

coronal; → mass; → ejection.

distal ejecta
  اشاناک ِ دور   
ešânâk-e dur

Fr.: éjecta distaux   

Geology: Impact ejecta found at distances more than 5 crater radii from the rim of the source crater.

Distal, from dist(ant), → distance + → -al; → ejecta.

Ešânâk, → ejecta; dur, → distance.

eject
  اشاندن   
ešândan

Fr.: éjecter   

To throw out material, for example by a massive star through stellar wind, or by a volcano in eruption.

From L. ejectus, p.p. of eicere "to throw out," from → ex- "out" + -icere, comb. form of jacere "to throw."

Ešândan, from Hamadâni ešândan "to throw out;" Pashto aestal, wištal "to throw, project;" Laki owštan "to throw, to shoot (with bow and arrow);" Lori šane "throwing," šane kerde "to throw;" Av. ah- "to throw," pres. ahya- "throws," asta- "thrown, shot," astar- "thrower, shooter;" cf. Khotanese ah- "to throw, shoot," Skt. as- "to throw, shoot," ásyati "throws," ásana- "throw, shot."

ejecta
  اشاناک   
ešânâk

Fr.: éjecta   

Material, in solid, liquid, or gaseous form, thrown out by a body, especially as a result of → volcanic eruption, → meteoritic impact, or → supernova explosion. See also: → ejecta blanket, → supernova ejecta.

Plural of L. ejectus, → eject.

Ešânâk "that which is ejected," from šân present stem of šândaneject + suffix -âk.

ejecta blanket
  پتو‌ی ِ اشاناک   
patu-ye ešânâk

Fr.: couverture d'éjecta   

Of an → impact crater, the ejecta that after the → impact event settles back to the Earth's surface. The ejecta blanket is thick near the → crater rim and thin outward from the crater.

ejecta; → blanket.

ejection
  اشانش   
ešâneš

Fr.: éjection   

Act or instance of ejecting; the state of being ejected.

Verbal noun of → eject.

interplanetary coronal mass ejections (ICME)
  اشانش ِ اندرسیاره‌ای ِ جرم از تاج   
ešâneš-e andarsayyâreyi-ye jerm az tâj

Fr.: éjection de masse coronale interplanétaire   

An → interplanetary manifestation of a → coronal mass ejection.

interplanetary; → coronal; → mass; → ejection.

reject
  واشاندن   
vâšândan

Fr.: rejeter   

To refuse to accept, take, consider, recognize, etc.

re- + jec-, combining form of jacere "to throw" + -tus p.p. suffix, → project.

supernova ejecta
  اشاناک ِ اَبَر-نو‌اختر   
ešânâk-e abar-now-axtar

Fr.: éjecta de supernova   

The material ejected by a → supernova explosion.

supernova; → ejecta.