Cosmological Principle
The Cosmological Principle is not a principle, but rather a reasonable assumption or axiom that severely restricts the large variety of possible cosmological theories.
cosmological principle Two assumptions which make up the basis of cosmology, namely that the universe is homogeneous and isotropic on sufficiently large scales.
Cosmological Principle
The assumption that any observer in any galaxy sees the same general features of the universe.
Cosmology ...
Cosmological Principle - The assumption that all observers in the Universe at a given time would observe the Universe to have the same essential features and large-scale structure
Cosmology - The study of the Universe as a whole ...
COSMOLOGICAL PRINCIPLE - Principle incorporating the axioms that there is no center to the universe, that the universe is the same in all directions (isotropic) and the same everywhere (homogeneous), when considered on the largest scales.
Cosmological Principle
(a) The hypothesis that the Universe is isotropic and homogeneous on very large distance scales.
The Cosmological Principle
In order to make any progress at all we need to adopt an overriding philosophical principle that can guide our development of a model of the universe. This principle is known as the Cosmological Principle.
Perfect Cosmological Principle
(a) The assumption adopted by the steady-state theory, that all observers, everywhere in space and at all times, would view the same large-scale picture of the Universe. [H76] ...
Cosmological Principle
This principle states that the distribution of matter across very large distances is the same everywhere in the universe and that the universe looks the same in all directions.
cosmological principle - (n.)
The postulate, put forth by most cosmologists, that the universe is both homogeneous and isotropic; it is sometimes stated that the universe looks the same to all observers everywhere.
cosmological redshift - (n.) ...
Cosmological Principle
In physical cosmology, the cosmological principle is an assumption, or working hypothesis, about the large scale structure of the cosmos, stating that:...
, which is supported by astronomical observations.
The cosmological principle is a Copernican idea. It means we are not in a special place. Every observer at a given cosmological time will see the same thing, such as the same Hubble law.
The Cosmological Principle:
The Universe is Homogeneous and Isotropic ...
The Cosmological Principle helps us describe the Universe, but there is a much more important rule that we use when we try to figure out how the Universe works.
the Cosmological Principle which demands that the universe looks the same way in all directions (isotropic) and has roughly the same smooth mixture of material (Homogeneous).
1933 - Edward Milne names and formalizes the cosmological principle
1934 - Georges Lemaître interprets the cosmological constant as due to a vacuum energy with an unusual perfect fluid equation of state ...
The second assumption, called the cosmological principle, states that an observer's view of the universe depends neither on the direction in which he looks nor on his location.
Cosmological Principles
The three cosmological principles are the basic assumptions about the universe derived from observations. With these assumptions, we can build a simple model on the universe.
If the large-scale Universe appears isotropic as viewed from Earth, the cosmological principle can be derived from the simpler Copernican principle, which states that there is no preferred (or special) observer or vantage point.
Their model was derived from an extension of the "cosmological principle" that had been used for previous theories such as Friedmann's model. It stated that the universe appeared the same from any location, but not necessarily for all times.
Here, S is a scale-factor (clearly time-dependent, but location-independent by construction through invoking the Cosmological Principle), and k is determined by the large-scale curvature.
See also: Metric expansion of space, Cosmological principle, Observable universe, and Cosmological horizon ...
model of the Universe because it implies that they all may have been very close to each other in the past, if we assume that they moved the same way in the past and in every part of the Universe. This assumption, called the "cosmological principle, ...
 See also: Universe, Time, Model, Galaxies, Distance
  
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