Being or located on or toward the outside; external.
→ out + -er suffix of comparative degree of adjectives.
Fr.: noyau externe
The upper zone of the → Earth's core, just below the → mantle, extending from a depth of about 2900 km to 5100 km. It is presumed to be → liquid because it sharply reduces → compressional wave velocities and does not transmit → shear waves. Its density is from 9 to 11 g/cm3. The → temperature ranges from 4400 °C in the outer areas to 6100 °C near the → inner core. Since shear waves do not propagate through a fluid, the Earth's outer core is considered to be liquid because the shear wave velocity is zero. Convection motion within the outer core, along with the rotation of the Earth creates an effect that maintains the Earth's → magnetic field.
outer Lindblad resonance (OLP)
bâzâvâyi-ye Lindblad-e boruni
Fr.: résonance de Lindblad externe
A → Lindblad resonance expressed by: Ωp = Ω + κ/m.
seyyâre-ye biruni (#)
Fr.: planète extérieure
fazâ, borun-fazâ, fazâ-ye biruni
Fr.: espace, espace extra-atmosphérique
The space beyond the Earth's atmosphere.
Fr.: flot, écoulement
The act of flowing out; a fluid that flows out; any outward movement. Opposite of → inflow.
1) General: The slow release of a gas that was trapped, frozen, absorbed or
adsorbed in some material.
1) Power which is given out by any plant or part of such plant, in the form and for the
From → out + put, from M.E. put(t)en "to push, thrust, put;" O.E. *putian.
Fr.: éducation grand public
The act of extending research activities beyond its current or conventional limits to a wide section of the population for educational purposes.
Borun-rasâni, from borun, → out, +
rasâni verbal noun of rasândan "to carry, guide, send," transitive
of rasidan "to reach, arrive," → access.
To obtain under contract with an outside supplier.
The transferring of certain business functions from internal staff to outside contractors.
Verbal noun from → outsource.
paradox of youth
Fr.: paradoxe de jeunesse
The observed presence of young stars in the immediate vicinity of the → supermassive black hole (SMBH), → Sgr A*, residing in the center of our Galaxy. The stellar population within 1 pc of the SMBH contains a variety of young and → massive stars orbiting the SMBH. Some of them are only about 20 Myr old and get as close as a few light-days to the SMBH, while from 0.1 to 0.4 pc even younger stars are found with ages of 3-7 Myr. The presence of these stars so near to the SMBH is a paradox. Their → in situ formation should be almost impossible, since the environment is too hostile for these stars to form. Indeed the strong → tidal influence of the SMBH should hamper their formation. On the other hand, the scenario considering their → migration from other places does not seem to be adequate. The time required for the migration from > 1 pc by dynamical friction would exceed their inferred ages unless the migration rate were somehow accelerated. This apparent contradiction was termed "paradox of youth" by Ghez et al. (2003, ApJ 586, L127). See also Genzel et al. (2010, Rev.Mod.Phys. 82, 3121, also at astro-ph/1006.0064).
Fr.: bruit de lecture
The noise added in the process of reading a detector such as a CCD.
In computer science, to upgrade a system by increasing the number of nodes. For example, instead of going from a CPU of X and memory of Y to a CPU with 4X and 4Y memory, use 4 machines with CPU of X and memory of Y. This is a type of → horizontal scaling. See also → scale in, → scale up, → scale down.
borunzani-ye šok, ~ toš
Fr.: émergence de l'onde de choc
A burst of very bright → ultraviolet or → soft X-ray radiation expected to occur in → core-collapse supernovae at the instant when the → supernova shock breaks out of the stellar surface. During the collapse of the progenitor → massive star, the density in the iron core increases drastically. Once the core material reaches → nuclear density, the core rebounds generating a → shock wave that moves outward through the star. When the shock reaches the outermost layers, it ejects them out into space at → relativistic speeds.
→ shock; breakout "a forceful escape from being confined or restrained," from break, from M.E. breken, O.E. brecan (cf. Du. breken, O.H.G. brehhan, Ger. brechen), from PIE base *bhreg- "to break" (see also → fraction) + → out.
Borunzani "emergence, evasion," from borun, → out, + zani verbal noun of zadan "to strike, beat," from Mid.Pers. zatan, žatan; O.Pers./Av. jan-, gan- "to strike, hit, smite, kill" (jantar- "smiter"); cf. Skt. han- "to strike, beat" (hantar- "smiter, killer"); Gk. theinein "to strike;" L. fendere "to strike, push;" Gmc. *gundjo "war, battle;" PIE *gwhen- "to strike, kill."
The cardinal point which is opposite to north. It is also the direction of the Sun at local noon (in the northern hemisphere).
M.E. suth(e), south(e), from O.E. suth "southward, in the south;" cf. O.S., O.Fris. suth "southward, in the south," M.Du. suut), O.H.G. sund, perhaps related to base of *sunnon "sun," with sense of "the region of the sun."
South is related to right since it is to the right when one faces the rising Sun.
This occurs in, for example, in Av., Skt., and O.Ir., as below.
South Atlantic Anomaly (SAA)
nâsâni-ye Atlas-e daštar
Fr.: Anomalie Atlantique Sud
A region of the Earth where the inner → Van Allen belt comes closest to the Earth's surface. It is due to the fact that the → geomagnetic field is offset from the center of the Earth. The region is centered near 25 degrees South 50 degrees West, close to the Atlantic coast of Brazil. The excess of trapped energetic particles in that region presents a problem for satellites in orbit around the Earth.
south celestial pole
qotb-e âsmâni-ye daštar
Fr.: pôle sud céleste
South Polar Layered Deposits (SPLD)
Lerdhâ-ye Laye-laye-ye Qotb-e Daštar
Fr.: couches de dépôt du pôle sud
A large area of the south polar region of → Mars which is covered with layers of → water ice and → dust. The SPLD, like the NPLD, has a maximum relief relative to the surrounding terrain of ~ 3.5 km and ~ 1,000 km across. Above the SPLD lies a very thin temporary (1-10 m) cap of → carbon dioxide ice/frost that snows out in the winter and sublimates over the spring and summer seasons. It is believed that the rhythmic nature of the deposits is related to oscillations in Mars' → orbital parameters (J. J. Plaut et al., 2007, Science 316, 92).
Fr.: pôle Sud
1) An → imaginary point in the
→ southern hemisphere representing the intersection of the
→ Earth's → rotation axis with the
→ globe with the → celestial sphere.