isotropic Assumed property of the universe such that the universe looks the same in every direction.
isotropy Assumed property of the universe such that the universe looks the same in every direction.
ISOTROPIC - Same in all directions (anisotropic = not isotropic; anisotropy - difference between different directions).
Isotropic - Looking the same in all directions
Jet - A narrow beam of gas ejected from a star or the nucleus of an active galaxy ...
Isotropic
(a) Having equal and uniform properties at all points and in all directions. In astronomy the term describes microwave background radiation.
isotropic - (n.)
Having the property of appearing the same in all directions. In astronomy, this term is often postulated to apply to the universe as a whole.
Jansky (Jy) - (n.) ...
*The isotropic radiator is a purely theoretical antenna that radiates equally in all directions. It is considered to be a point in space with no dimensions and no mass.
Linearly anisotropic scattering. [H76]
Roche Limit
The minimum distance at which a satellite under the influence of its own gravitation and that of a central mass about which it is describing a circular Keplerian orbit can be in equilibrium.
The Effective Isotropic Radiated Power (EIRP) of a transmitter (uplink) is the power that the transmitter appears to have if the transmitter was an isotropic radiator, i.e., if it radiated equally in all directions.
problem : MWB isotropic but disconnected : how ?
period of rapid expansion (inflation) 10-35 - 10-24 s
our visible universe was smaller and connected
predicts : Omegao = 1.0 and proton decay (still unknown) ...
Tristructural-isotropic (TRISO) fuel is a type of micro fuel particle. It consists of a fuel kernel composed of UOX
Uranium dioxide ...
anisotropic Exhibiting different properties when tested along axes in different directions.
isotropic (NASA SP-7, 1965) In general, pertaining to a state in which a quantity or spatial derivatives thereof are independent of direction. Also called isotropous. isotropic antenna (NASA SP-7, 1965) = unipole.
All of the atoms of an element will have very nearly the same chemical properties, but the isotopes can have very different nuclear properties. isotropic exhibiting the same property when looking in any given direction.
On the basis of isotropic and homogeneous solutions of these enhanced equations, the so-called Friedmann-Lemaître-Robertson-Walker solutions, ...
Materials with anisotropic structures, such as crystals and composites, will generally have different expansion coefficients in different orientations.
The Discovery of an isotropic distribution of the Gamma-ray burst events Mapping the Milky Way using the 26 Al Gamma-ray line Discovery of Blazar Active Galactic Nuclei as primary source of the highest energy cosmic Gamma-rays Discovery of the ...
1917 - Willem de Sitter derives an isotropic static cosmology with a cosmological constant as well as an empty expanding cosmology with a cosmological constant, termed a de Sitter universe ...
Richstone and Tremaine 1985 (ApJ 296, 370), following work by people such as Duncan, showed that a sufficiently anisotropic velocity distribution of the stars could mimic this result, ...
Their helical motion around the magnetic field lines of the Galaxy causes their distribution to appear isotropic (they are detected equally in all directions), even though astronomers believe that they originate in the shocks of supernova remnants.
They told him that it was homogeneous and isotropic. They also told him that it was rather static (even though Slipher had detected all of those spiral nebulae redshifts; this was before the Curtis-Shapley Debate and when Hubble did all of his stuff, ...
Redshift Distance Law of galaxies, nowadays known as Hubble's law, which, once the redshift is interpreted as a measure of recession speed, is consistent with the solutions of Einstein�s General Relativity Equations for a homogeneous, isotropic ...
This theoretical concept (it cannot actually exist) is called an isotropic radiator. Voyager's, HGA, for example, provides a gain of 47 dBi at X-band. The reference "i" in dBi means the ratio is referenced to an isotropic radiator.
It is generally thought that the Universe should be isotropic and homogenous, meaning that everything should look the same in all directions. This also means that there should be an equal number of left-handed and right-handed galaxies.
In contrast with the isotropically emitted scintillation light, Cerenkov light is emitted along the surface of a forward-directed cone centered on the particle velocity vector.
The radiation COBE observed was almost equally bright in all directions ("isotropic"), but not completely so: a small unevenness ("anisotropy") remained, and MAP is designed to observe it better.
Since blackbody radiation is isotropic, this equation reduces nicely to p = (4π/3c) I. The total intensity of the blackbody radiation field is purely a function of the temperature, T, to the fourth power.
In technical terms, cosmologists say the universe is "homogeneous" and "isotropic" on its largest scales. Homogeneous means that the universe has the same basic composition and structure everywhere.
The gamma ray bursters appear to have an isotropic distribution in space. The number distribution appears to go as at large L, but to fall off at low L, indicating a confined source distribution.
horizon problem: In cosmology, the circumstance that the primordial background radiation seems much more isotropic than could be explained by the standard big bang theory.
Isotropy: Principle of isotropy says that the universe looks roughly the same in every direction. Isotropy is independent of homogeneity. The universe can be homogeneous but non-isotropic or vice versa.
This radiation was predicted to be a remnant from the very early time in the age of the Universe, before matter had been formed, when the Universe was still filled with hot radiation. The radiation was isotropic and it corresponded to a temperature ...
along axes in different directions - a physical measurement made in one direction differs from the measurement made in another direction. For example, the cosmic microwave background radiation (the radiant heat left over from the ) is anisotropic.
In fact, an observer on one of those very distant galaxies would see precisely the same effect: all galaxies would be receding isotropically away from him, with the rate of recession proportional to the galaxy's distance from him.
See also: Limiting magnitude, Video observations Poynting-Robertson effect A dissipative force due to the anisotropic loss of momentum by a particle through re-radiation of solar energy.
 See also: Time, Energy, Light, Distance, Universe
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