astro
10-02-2006, 01:19 AM
http://physicsmathforums.com
Moving Dimensions Theory's central postulate is that:
The fourth dimension is expanding relative to the three spatial dimensions.
A more specific verison is: the fourth dimension is expanding relative to the three spatial dimensions, at a rate of c in quatized units of the planck length.
MDT accounts for both Inflation & Dark Energy:
Simply put, the expansion of the fourth dimension relative to the three spatial dimensions has been slowing down. Thus, the early universe was casually connected, as light traveled faster, explaining Inflation. MDT stipulates that light is matter surfing the fourth expanding dimension.
Also, it appears that the universe's expansion is accelerating. This is because the expansion of the fourth dimension is slowing relative to the three spatial dimensions. Thus light takes longer to travel from type la supernovas, and hence it appears that type la supernovas are further away.
So it is that MDT explains both Inflation and Dark Enegry:
1. The fourth dimension is expanding relative to the three spatial dimensions.
2. The rate of the expansion of the fourth dimension is slowing.
Cosmic inflation:
http://en.wikipedia.org/wiki/Cosmic_inflation
Cosmic inflation is the idea, first proposed by Alan Guth in 1981, that the nascent universe passed through a phase of exponential expansion (the inflationary epoch) that was driven by a negative pressure vacuum energy density.
This expansion is similar to a de Sitter universe with a positive cosmological constant. As a direct consequence of this expansion, all of the observable universe originated in a small causally-connected region. Quantum fluctuations in this microscopic region, magnified to cosmic size, then became the seeds for the growth of structure in the universe (see galaxy formation and evolution). The particle responsible for inflation is generally called the inflaton.
The name of the theory was a semi-humorous reference to the economic inflation in the United States in the late 1970s.
Dark Energy:
http://en.wikipedia.org/wiki/Dark_energy
During the late 1990s, observations of type Ia supernovae ("one-A") by the Supernova Cosmology Project and the High-z Supernova Search Team suggested that the expansion of the universe is accelerating.[4][5] Since then, these observations have been corroborated by several independent sources. Measurements of the cosmic microwave background, gravitational lensing, and the large scale structure of the cosmos as well as improved measurements of supernovae have been consistent with the Lambda-CDM model.[6]
Unsolved problems in physics: Why is the expansion of the universe accelerating, as we have observed? Is our understanding of redshift complete? If it is, then what is the nature of the dark energy driving this acceleration?The type Ia supernovae provide the most direct evidence for dark energy. Measuring the scale factor at the time that light was emitted from an object is accomplished easily by measuring the redshift of the receding object. Finding the distance to an object is a more difficult problem, however. It is necessary to find standard candles: objects for which the actual brightness, what astronomers call the absolute magnitude, is known, so that it is possible to relate the observed brightness, or apparent magnitude, to the distance. Without standard candles, it is impossible to measure the redshift-distance relation of Hubble's law. Type Ia supernovae are the best known standard candles for cosmological observation because they are very bright and thus visible across billions of light years. The consistency in absolute magnitude for type Ia supernovae is explained by the favored model of an old white dwarf star which gains mass from a companion star and grows until it reaches the precisely defined Chandrasekhar limit. At this mass, the white dwarf is unstable to thermonuclear runaway and explodes as a type Ia supernova with a characteristic brightness. The observed brightness of the supernovae are plotted against their redshifts, and this is used to measure the expansion history of the universe. These observations indicate that the expansion of the universe is not decelerating, which would be expected for a matter-dominated universe, but rather is mysteriously accelerating. These observations are explained by postulating a kind of energy with negative pressure (see equation of state (cosmology) for a mathematical explanation): dark energy.
http://physicsmathforums.com
Moving Dimensions Theory's central postulate is that:
The fourth dimension is expanding relative to the three spatial dimensions.
A more specific verison is: the fourth dimension is expanding relative to the three spatial dimensions, at a rate of c in quatized units of the planck length.
MDT accounts for both Inflation & Dark Energy:
Simply put, the expansion of the fourth dimension relative to the three spatial dimensions has been slowing down. Thus, the early universe was casually connected, as light traveled faster, explaining Inflation. MDT stipulates that light is matter surfing the fourth expanding dimension.
Also, it appears that the universe's expansion is accelerating. This is because the expansion of the fourth dimension is slowing relative to the three spatial dimensions. Thus light takes longer to travel from type la supernovas, and hence it appears that type la supernovas are further away.
So it is that MDT explains both Inflation and Dark Enegry:
1. The fourth dimension is expanding relative to the three spatial dimensions.
2. The rate of the expansion of the fourth dimension is slowing.
Cosmic inflation:
http://en.wikipedia.org/wiki/Cosmic_inflation
Cosmic inflation is the idea, first proposed by Alan Guth in 1981, that the nascent universe passed through a phase of exponential expansion (the inflationary epoch) that was driven by a negative pressure vacuum energy density.
This expansion is similar to a de Sitter universe with a positive cosmological constant. As a direct consequence of this expansion, all of the observable universe originated in a small causally-connected region. Quantum fluctuations in this microscopic region, magnified to cosmic size, then became the seeds for the growth of structure in the universe (see galaxy formation and evolution). The particle responsible for inflation is generally called the inflaton.
The name of the theory was a semi-humorous reference to the economic inflation in the United States in the late 1970s.
Dark Energy:
http://en.wikipedia.org/wiki/Dark_energy
During the late 1990s, observations of type Ia supernovae ("one-A") by the Supernova Cosmology Project and the High-z Supernova Search Team suggested that the expansion of the universe is accelerating.[4][5] Since then, these observations have been corroborated by several independent sources. Measurements of the cosmic microwave background, gravitational lensing, and the large scale structure of the cosmos as well as improved measurements of supernovae have been consistent with the Lambda-CDM model.[6]
Unsolved problems in physics: Why is the expansion of the universe accelerating, as we have observed? Is our understanding of redshift complete? If it is, then what is the nature of the dark energy driving this acceleration?The type Ia supernovae provide the most direct evidence for dark energy. Measuring the scale factor at the time that light was emitted from an object is accomplished easily by measuring the redshift of the receding object. Finding the distance to an object is a more difficult problem, however. It is necessary to find standard candles: objects for which the actual brightness, what astronomers call the absolute magnitude, is known, so that it is possible to relate the observed brightness, or apparent magnitude, to the distance. Without standard candles, it is impossible to measure the redshift-distance relation of Hubble's law. Type Ia supernovae are the best known standard candles for cosmological observation because they are very bright and thus visible across billions of light years. The consistency in absolute magnitude for type Ia supernovae is explained by the favored model of an old white dwarf star which gains mass from a companion star and grows until it reaches the precisely defined Chandrasekhar limit. At this mass, the white dwarf is unstable to thermonuclear runaway and explodes as a type Ia supernova with a characteristic brightness. The observed brightness of the supernovae are plotted against their redshifts, and this is used to measure the expansion history of the universe. These observations indicate that the expansion of the universe is not decelerating, which would be expected for a matter-dominated universe, but rather is mysteriously accelerating. These observations are explained by postulating a kind of energy with negative pressure (see equation of state (cosmology) for a mathematical explanation): dark energy.
http://physicsmathforums.com