Isotropy
The premise that there is no preferred direction singled out in space (space looks the same in all directions about a point). Isotropy may be tested for by searching for anisotropy in the 2.7 K background radiation.
Cosmic Anisotropy Telescope
The Cosmic Anisotropy Telescope CAT was a three-element interferometer for cosmic microwave background radiation (CMB/R) observations at 13 to 17 GHz, based at the Mullard Radio Astronomy Observatory.
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.
isotropy Assumed property of the universe such that the universe looks the same in every direction.
Isotropy of observable universe
Proponents of big bang also cite isotropy of the observable universe to one part in one hundred thousand as evidence that big bang is valid[1].
Isotropy
The assumption that in its general properties the universe looks the same in every direction
J ...
Isotropy
(a) Quality of being the same in all directions. Compare anisotropy.
(b) In cosmology, the property that the universe appears the same in all directions.
ISOTROPY
Isotropy is a state in which a physical characteristic (like temperature) is constant in value along axes in different directions. A physical measurement made in one direction is the same as the measurement made in another direction.
anisotropy
the variation of a physical property depending on direction
annular eclipse ...
The isotropy of the GRO data has convinced most astronomers that the bursts must originate at so-called cosmological distances"that is, far beyond our Milky Way galaxy.
The anisotropy of the cosmic microwave background on different angular scales can also be used to study reionization. Photons undergo scattering when there are free electrons present, in a process known as Thomson scattering.
A small anisotropy has been detected among the highest energy particles--i.e., those with energies above about 1018 eV.
[edit] Anisotropy
Many solid materials will expand evenly in all three directions, but this is not true for all.
Dipole Anisotropy
A variation in the intensity of the cosmic background radiation caused by the motion of the Milky Way.
anisotropy (Plasma Physics and Fusion Energy Glossary) Term used to describe a medium whose characteristic properties vary with direction of travel through the medium. (e.g.
The Microwave Anisotropy Probe (MAP)
A Tribute to the Compton Gamma Ray Observatory!
So You Want Science? Just ASCA! ...
The cosmological principle holds that the universe is the same in all places (a property known as homogeneity) and looks the same in all directions (a property known as isotropy). This principle refers to properties on the largest scales.
The Wilkinson Microwave Anisotropy Probe (WMAP), an orbiting observatory, spent a year making a detailed map of minute temperature variations in the CMB.
The anisotropy effect was much stronger in this region, which suggests that its composition is even more crystalline composition with a different angle of most resistance (arising from different crystalline alignment) from the rest of the inner core.
They studied 700 galaxy clusters using the Wilkinson Microwave Anisotropy Probe (WMAP) three year data set released two years ago, which first brought the mystery motion to light.
Wilkinson Microwave Anisotropy Probe
The Wilkinson Microwave Anisotropy Probe ? also known as the Microwave Anisotropy Probe , and Explorer 80 ?
When the concepts of homogeneity and isotropy are combined together, they make up the Cosmological Principle. This is sort of a rule that needs to be followed when people think about making models of the Universe.
More recently, the Wilkinson Microwave Anisotropy Probe (WMAP) team has made a more detailed full-sky map of this oldest light in the universe. The WMAP image brings the COBE picture into sharp focus, and provides firm answers to age-old questions.
Johns Hopkins University professor Charles Bennett is lead scientist for NASA's Wilkinson Microwave Anisotropy Probe mission.
Microwave Background Radiation: recombination, anisotropy, Sunyaev-Zeldovich effect
dark matter: MACHO, WIMP, neutrino
de Sitter space, Friedmann-Robertson-Walker metric(*), Newtonian derivation of the Friedmann equation ...
The most recent and complete research is from the Wilkinson Microwave Anisotropy Probe (WMAP for short), sponsored mainly by NASA. It has made the highest-resolution image of the CMB: The angular resolution of WMAP was 0.
Results from NASA's Wilkinson Microwave Anisotropy Probe (WMAP) released in February 2003 show that the first stars formed when the Universe was only about 200 million years old.
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.
The arguments for a distant origin were originally quite general - isotropy plus log N -log S behavior, which to galaxy people fairly shout ``Cosmologically distant!".
The framework for the model relies on Albert Einstein's general relativity and on simplifying assumptions (such as homogeneity and isotropy of space). The governing equations had been formulated by Alexander Friedmann.
The earliest and most important of these confirmations were by the Millimeter Anisotropy eXperiment IMaging Array (MAXIMA), a balloon-borne experiment led by UC Berkeley physicist Paul Richards, ...
The first map of the anisotropy in the CMBR was provided by the Cosmic Background Explorer (COBE); this was significantly improved upon by results from the Wilkinson Microwave Anisotropy Probe (WMAP).
It shows a comparison of the coarse resolution of COBE with the finer resolution of the Wilkinson Microwave Anisotropy Probe (WMAP). WMAP has over 30 times greater resolution than the COBE satellite.
COBE detected extremely fluctuations (anisotropy), in the cosmic microwave background (the heat left over from the Big Bang). The differences in temperature were tiny, ranging from 2.7281 Kelvin (degrees above absolute zero) to 2.
The majority of scientists agree that our Universe is flat based on readings from the Wilkinson Microwave Anisotropy Probe(WMAP). A few others disagree. Remember, everyone thought our planet was flat until explorers discovered differently.
The MAP satellite is designed to probe conditions in the early Universe. MAP will measure temperature differences (anisotropy) in the Cosmic Microwave Background Radiation (CMBR) in an effort to explore how and when structures of galaxies formed in ...
The Wilkinson Microwave Anisotropy Probe WMAP spacecraft resides in a halo orbit near Earth's L2 (about the same distance from Earth as L1), where it enjoys an uninterrupted view into deep space.
NASA today released the best "baby picture" of the Universe ever taken; the image contains such stunning detail that it may be one of the most important scientific results of recent years. Scientists used NASA's Wilkinson Microwave Anisotropy Probe ...
The rapid initial expansion has slowed over time, and the current amount, the Hubble constant H0 is 71 kilometers per second per megaparsec as determined by results from WMAP (Wilkinson Microwave Anisotropy Probe).
to = 1/Ho, the age of the Universe (or the Hubble time, to) can be estimated to be 14 billion years, consistent with the most accurate current value of 13.7 +/- 0.2 Gyr determined from the combined measurements of the CMB anisotropy and the ...
 See also: Universe, Energy, Time, Light, Galaxies
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