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").
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 Earth object (IEO)
barâxt-e daruni-ye madâr-e zamin
Fr.: objet interne à l'orbite terrestre
inner Lagrangian point
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 Lindblad resonance (ILR)
bâzâvâyi-ye Lindblad-e daruni
Fr.: résonance de Lindblad interne
A → Lindblad resonance expressed by: Ωp = Ω - κ/m.
sayârehâ-ye daruni (#)
Fr.: planètes internes
The planets Mercury, Venus, Earth and Mars collectively. T hey are also known as the terrestrial planets.
innermost stable circular orbit (ISCO)
darunitarin madâr-e dâyere-yi-ye pâydâr
Fr.: orbite circulaire stable intérieur
The smallest → circular orbit in which a particle can stably orbit a → black hole according to → general relativity without the risk of falling past the → event horizon. In other words, the ISCO is the inner edge of the → accretion disk around a black hole. Therefore, characteristics of accretion disks depend on ISCO. The radius of ISCO is calculated to be three times the → Schwarzschild radius (3 RSch). ISCO is closer to event horizon for rotating black hole.