An Etymological Dictionary of Astronomy and Astrophysics

فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

M. Heydari-Malayeri    -    Paris Observatory



<< < -sc Sag sam sat sca sca Sch sco sec sec sec sei sel sem sep sex Sha she sho sid sig sim sin Sir sky slo sno sod sol sol sol sol sou sou spa spe spe spe spe sph spi spo SS sta sta sta sta ste ste sto str str str sub sub suc sun sup sup sup sup sur swi syn Syr > >>

Number of Results: 1290
stationary black hole
  سیه‌چال ِ ایست‌ور   
siyah-câl-e istvar

Fr.: trou noir stationnaire   

A → black hole with zero → angular momentum, that does not rotate.

stationary; → black hole.

stationary limit surface
  رویه‌ی ِ حدّ ِ ایست‌ور   
ruye-ye hadd-e istvar

Fr.: surface limite stationnaire   

A property of → space-time outside a → rotating black hole, which consists of a surface which geometrically bounds the → ergosphere outward. At the stationary limit a particle would have to move with the local light velocity in order to appear stationary to a distant observer. This is because the space here is being dragged at exactly the speed of light relative to the rest of space. Outside this limit space is still dragged, but at a rate less than the speed of light. Also known as → static limit.

stationary; → limit; → surface.

stationary noise
  نوفه‌ی ِ ایست‌ور   
nufe-ye istvar

Fr.: bruit stationnaire   

Electronics: A random noise whose intensity remains constant with time.

stationary; → noise.

stationary orbit
  مدار ِ ایست‌ور   
madâr-e istvar

Fr.: orbite stationnaire   

An orbit in which the satellite revolves about the primary at the angular rate at which the primary rotates on its axis. From the primary, the satellite thus appears to be stationary over a point on the primary.

stationary; → orbit.

stationary phase
  فاز ِ ایست‌ور   
fâz-e istvar

Fr.: phase stationnaire   

Mechanics: The condition of a body or system at rest.

stationary; → phase.

stationary point
  نقطه‌ی ِ ایست‌ور   
noqte-ye istvar

Fr.: station   

Of a planet, the position at which the rate of change of the apparent right ascension of a planet is momentarily zero.

stationary; → point.

stationary satellite
  ماهواره‌ی ِ ایست‌ور   
mâhvâre-ye istvar

Fr.: satellite stationnaire   

An artificial satellite in a synchronous orbit. → geostationary orbit

stationary; → satellite.

stationary wave
  موج ِ ایست‌ور   
mowj-e istvar

Fr.: onde stationnaire   

Same as → standing wave.

stationary; → wave.

âmâri (#)

Fr.: statistique   

Of, pertaining to, consisting of, or based on → statistics.

Statistic, from → statistics + → -al.

statistical equilibrium
  ترازمندی ِ آماری   
tarâzmandi-ye âmâri

Fr.: équilibre statistique   

A state in which the average density of atoms per cubic centimeter in any atomic state does not change with time and in which, statistically, energy is equally divided among all degrees of freedom if classical concepts prevail.

statistical; → equilibrium.

statistical hypothesis
  انگاره‌ی ِ آماری   
engâre-ye âmâri

Fr.: hypothèse statistique   

An assumed statement about the way a → random variable is distributed. A statistical hypothesis generally specifies the form of the → probability distribution or the values of the parameters of the distribution. The statement may be true or false. See also → null hypothesis.

statistical; → hypothesis.

statistical hypothesis testing
  آزمون ِ انگاره‌ی ِ آماری   
âzmun-e engâre-ye âmâri

Fr.: test d'hypothèse statistique   

A method of making decision between rejecting or not rejecting a → null hypothesis on the basis of a set of observations.

statistical; → hypothesis; → test.

statistical inference
  دربرد ِ آماری   
darbord-e âmâri

Fr.: inférence statistique   

The process of inferring certain facts about a → statistical population from results found in a → sample.

statistical; → inference.

statistical law
  قانون ِ آماری   
qânun-e âmâri (#)

Fr.: loi statistique   

A law that governs the behavior of a system consisting of a large number of particles and which differs from the laws obeyed by each of the particles making up the macroscopic system. See also → dynamical law.

statistical; → law.

statistical mechanics
  مکانیک ِ آماری   
mekânik-e âmâri (#)

Fr.: mécanique statistique   

statistical physics.

statistical; → mechanics.

statistical parallax
  دیدگشت ِ آماری   
didgašt-e âmâri

Fr.: parallaxe statistique   

The mean parallax of a group of stars that are all at approximately the same distance, as determined from their radial velocities and proper motions.

statistical; → parallax.

statistical physics
  فیزیک ِ آماری   
fizik-e âmâri (#)

Fr.: physique statistique   

The branch of physics that applies methods of → probability theory and → statistics to the behavior of large numbers of microscopic particles (such as molecules, atoms, or subatomic particles) in order to explain and predict the overall properties of the system composed of such particles.

statistical; → physics.

statistical population
  پرینش ِ آماری   
porineš-e âmâri

Fr.: population statistique   

Any collection of individuals or items from which → samples are drawn. See also → finite population, → infinite population.

statistical; → population.

statistical thermodynamics
  گرماتوانیک ِ آماری   
garmâtavânik-e âmâri

Fr.: thermodynamique statistique   

Same as → statistical mechanics.

statistical; → thermodynamics.

statistical weight
  وزن ِ آماری   
vazn-e âmâri

Fr.: poids statistique   

1) Statistics: A number assigned to each value or range of values of a given quantity, giving the number of times this value or range of values is found to be observed.
2) Statistical mechanics: A multiplicative factor in the expression for the probability of finding a system in a given quantum state. Usually the number of degenerate substates contained in the state.

statistical; → weight.

<< < -sc Sag sam sat sca sca Sch sco sec sec sec sei sel sem sep sex Sha she sho sid sig sim sin Sir sky slo sno sod sol sol sol sol sou sou spa spe spe spe spe sph spi spo SS sta sta sta sta ste ste sto str str str sub sub suc sun sup sup sup sup sur swi syn Syr > >>