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Milne model, the Glossary

Index Milne model

The Milne model was a special-relativistic cosmological model proposed by Edward Arthur Milne in 1935.[1]

Table of Contents

  1. 24 relations: Cambridge University Press, Cosmological principle, Curvature, Deceleration parameter, Edward Arthur Milne, Energy density, Friedmann equations, Friedmann–Lemaître–Robertson–Walker metric, General relativity, Hyperbolic geometry, Minkowski space, Observable universe, Observational cosmology, Parametrization (geometry), Peculiar velocity, Physical cosmology, Recessional velocity, Rindler coordinates, Scale factor (cosmology), Scientific modelling, Shape of the universe, Special relativity, W. H. Freeman and Company, 1.

  2. 1935 in science
  3. Minkowski spacetime

Cambridge University Press

Cambridge University Press is the university press of the University of Cambridge.

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Cosmological principle

In modern physical cosmology, the cosmological principle is the notion that the spatial distribution of matter in the universe is uniformly isotropic and homogeneous when viewed on a large enough scale, since the forces are expected to act equally throughout the universe on a large scale, and should, therefore, produce no observable inequalities in the large-scale structuring over the course of evolution of the matter field that was initially laid down by the Big Bang.

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Curvature

In mathematics, curvature is any of several strongly related concepts in geometry that intuitively measure the amount by which a curve deviates from being a straight line or by which a surface deviates from being a plane.

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Deceleration parameter

The deceleration parameter q in cosmology is a dimensionless measure of the cosmic acceleration of the expansion of space in a Friedmann–Lemaître–Robertson–Walker universe.

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Edward Arthur Milne

Edward Arthur Milne FRS (14 February 1896 – 21 September 1950) was a British astrophysicist and mathematician.

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Energy density

In physics, energy density is the amount of energy stored in a given system or region of space per unit volume.

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Friedmann equations

The Friedmann equations, also known as the Friedmann–Lemaître (FL) equations, are a set of equations in physical cosmology that govern the expansion of space in homogeneous and isotropic models of the universe within the context of general relativity.

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Friedmann–Lemaître–Robertson–Walker metric

The Friedmann–Lemaître–Robertson–Walker metric (FLRW) is a metric based on an exact solution of the Einstein field equations of general relativity. Milne model and Friedmann–Lemaître–Robertson–Walker metric are exact solutions in general relativity.

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General relativity

General relativity, also known as the general theory of relativity and Einstein's theory of gravity, is the geometric theory of gravitation published by Albert Einstein in 1915 and is the current description of gravitation in modern physics.

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Hyperbolic geometry

In mathematics, hyperbolic geometry (also called Lobachevskian geometry or Bolyai–Lobachevskian geometry) is a non-Euclidean geometry.

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Minkowski space

In physics, Minkowski space (or Minkowski spacetime) is the main mathematical description of spacetime in the absence of gravitation. Milne model and Minkowski space are exact solutions in general relativity and Minkowski spacetime.

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Observable universe

The observable universe is a ball-shaped region of the universe consisting of all matter that can be observed from Earth or its space-based telescopes and exploratory probes at the present time; the electromagnetic radiation from these objects has had time to reach the Solar System and Earth since the beginning of the cosmological expansion.

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Observational cosmology

Observational cosmology is the study of the structure, the evolution and the origin of the universe through observation, using instruments such as telescopes and cosmic ray detectors.

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Parametrization (geometry)

In mathematics, and more specifically in geometry, parametrization (or parameterization; also parameterisation, parametrisation) is the process of finding parametric equations of a curve, a surface, or, more generally, a manifold or a variety, defined by an implicit equation.

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Peculiar velocity

Peculiar motion or peculiar velocity refers to the velocity of an object relative to a rest frame — usually a frame in which the average velocity of some objects is zero.

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Physical cosmology

Physical cosmology is a branch of cosmology concerned with the study of cosmological models.

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Recessional velocity

Recessional velocity is the rate at which an extragalactic astronomical object recedes (becomes more distant) from an observer as a result of the expansion of the universe.

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Rindler coordinates

Rindler coordinates are a coordinate system used in the context of special relativity to describe the hyperbolic acceleration of a uniformly accelerating reference frame in flat spacetime.

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Scale factor (cosmology)

The expansion of the universe is parametrized by a dimensionless scale factor a. Also known as the cosmic scale factor or sometimes the Robertson–Walker scale factor, this is a key parameter of the Friedmann equations.

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Scientific modelling

Scientific modelling is an activity that produces models representing empirical objects, phenomena, and physical processes, to make a particular part or feature of the world easier to understand, define, quantify, visualize, or simulate.

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Shape of the universe

In physical cosmology, the shape of the universe refers to both its local and global geometry.

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Special relativity

In physics, the special theory of relativity, or special relativity for short, is a scientific theory of the relationship between space and time.

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W. H. Freeman and Company

W.

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1

1 (one, unit, unity) is a number representing a single or the only entity.

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See also

1935 in science

Minkowski spacetime

References

[1] https://en.wikipedia.org/wiki/Milne_model

Also known as Empty universe, Milne space, Milne universe.