An Etymological Dictionary of Astronomy and Astrophysics
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فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 6 Search : inner
inner
  درونی   
daruni (#)

Fr.: interne   

Situated within or farther within; interior.

From O.E. inra, comparative of inne (adv.) "inside;" → in-.

Daruni, adj. of darun "in, into; within" (Mid.Pers. andarôn "inside," from andar, → inter-, + rôn "side, direction;" Av. ravan- "(course of a) river").

inner core
  مغزه‌ی ِ درونی   
maqze-ye daruni

Fr.: noyau interne   

The central part of the → Earth's core, composed of solidified → iron and → nickel, and extending from a depth of about 5100 km to the center of the Earth, at 6360 km. Its radius is about 1/3 that of the whole core and is effectively decoupled from the → mantle due to the molten nature of the surrounding → outer core. The radius of the inner core is defined by a small increase in → compressional wave velocity at a radius of about 1200 km. Its density is about 12 g/cm3. The → temperature of the inner core has been estimated at 5000-7000 °C.

inner; → core.

inner Earth object (IEO)
  بر‌آخت ِ درونی ِ مدار ِ زمین   
barâxt-e daruni-ye madâr-e zamin

Fr.: objet interne à l'orbite terrestre   

A → near-Earth object whose → orbit lies always inside Earth's orbit.

inner; → Earth; → object.

inner Lagrangian point
  نقطه‌ی ِ لاگرانژ ِ درونی   
noqte-ye Lagrange-e daruni (#)

Fr.: point de Lagrange interne   

One of the five → Lagrangian points, denoted L1, which lies between the two bodies on the line passing through their center of mass. In a → close binary star system mass transfer occurs through this point.

inner; → Lagrangian points.

inner Lindblad resonance (ILR)
  باز‌آوایی ِ لیندبلاد ِ درونی   
bâzâvâyi-ye Lindblad-e daruni

Fr.: résonance de Lindblad interne   

A → Lindblad resonance expressed by: Ωp = Ω - κ/m.

inner; → Lindblad resonance.

inner planets
  سیاره‌های ِ درونی   
sayârehâ-ye daruni (#)

Fr.: planètes internes   

The planets Mercury, Venus, Earth and Mars collectively. T hey are also known as the terrestrial planets.

inner; → planet.