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Dark energy - Cosmological constant | A Wisdom Archive on Dark energy - Cosmological constant | | Dark energy - Cosmological constant A selection of articles related to Dark energy - Cosmological constant | |
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More material related to Dark Energy can be found here:
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Dark energy, Dark energy - Cosmological constant, Dark energy - Evidence for dark energy, Dark energy - History, Dark energy - Implications for the fate of the universe, Dark energy - Nature of dark energy, Dark energy - Other ideas, Dark energy - Quintessence, Dark-energy star, Proponents of non-standard cosmologies argue that the evidence for dark energy is in fact evidence that the big bang theory is flawed
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ARTICLES RELATED TO Dark energy - Cosmological constant | |
| | |  Dark energy - Cosmological constant: Encyclopedia II - Dark energy - Nature of dark energyThe exact nature of this dark energy is a matter of speculation. It is known to be very homogeneous, not very dense and doesn't interact strongly through any of the fundamental forces other than gravity. Since it is not very dense—roughly 10−29 grams per cubic centimeter—it is hard to imagine experiments to detect it in the laboratory (but see the references for a claimed detection). Dark energy can only have such a profound impact on the universe, making up 70% of all energy, because it uniformly fills otherwise empty space. The two leading models are quintessence and the cosmological constant.
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See also:Dark energy, Dark energy - Evidence for dark energy, Dark energy - Nature of dark energy, Dark energy - Cosmological constant, Dark energy - Quintessence, Dark energy - Other ideas, Dark energy - Implications for the fate of the universe, Dark energy - History Read more here: » Dark energy: Encyclopedia II - Dark energy - Nature of dark energy |
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| | | | Dark energy - Cosmological constant: Encyclopedia II - Dark energy - Evidence for dark energy During the late 1990s, observations of type Ia supernovae ("one a") suggested that the expansion of the universe is accelerating. These observations have been corroborated by several independent sources since then: the cosmic microwave background, gravitational lensing, large scale structure as well as improved measurements of the supernovae. All these elements are consistent with the concordance Lambda-CDM model.
The type Ia supernovae provide the most direct evidence for dark energy. Measuring the velocity of receding objects is acc ...
See also:Dark energy, Dark energy - Evidence for dark energy, Dark energy - Nature of dark energy, Dark energy - Cosmological constant, Dark energy - Quintessence, Dark energy - Other ideas, Dark energy - Implications for the fate of the universe, Dark energy - History Read more here: » Dark energy: Encyclopedia II - Dark energy - Evidence for dark energy |
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| | | | Dark energy - Cosmological constant: Encyclopedia II - Dark energy - Implications for the fate of the universe Cosmologists estimate that the acceleration began roughly 5 billion years ago. Before that, it is thought that the expansion was decelerating, due to the attractive influence of dark matter and baryons. The density of dark matter in an expanding universe disappears more quickly than dark energy, and eventually the dark energy dominates. Specifically, when the volume of the universe doubles, the density of dark matter is halved but the density of dark energy is nearly u ...
See also:Dark energy, Dark energy - Evidence for dark energy, Dark energy - Nature of dark energy, Dark energy - Cosmological constant, Dark energy - Quintessence, Dark energy - Other ideas, Dark energy - Implications for the fate of the universe, Dark energy - History Read more here: » Dark energy: Encyclopedia II - Dark energy - Implications for the fate of the universe |
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| | | | Dark energy - Cosmological constant: Encyclopedia II - Dark energy - Evidence for dark energy During the late 1990s, observations of type Ia supernovae suggested that the expansion of the universe is accelerating. These observations have been corroborated by several independent sources since then: the cosmic microwave background, gravitational lensing, large scale structure as well as improved measurements of the supernovae. All these elements are consistent with the concordance Lambda-CDM model.
The type Ia supernovae provide the most direct evidence for dark energy. Measuring the velocity of receding objects is accomplished ...
See also:Dark energy, Dark energy - Evidence for dark energy, Dark energy - Nature of dark energy, Dark energy - Cosmological constant, Dark energy - Quintessence, Dark energy - Other ideas, Dark energy - Implications for the fate of the universe, Dark energy - History Read more here: » Dark energy: Encyclopedia II - Dark energy - Evidence for dark energy |
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| | | | Dark energy - Cosmological constant: Encyclopedia II - Dark energy - History The cosmological constant was first proposed by Einstein as a mechanism to obtain a stable solution of the gravitational field equation that would lead to a static universe, effectively using dark energy to balance gravity. Not only was the mechanism an inelegant example of fine-tuning, it was soon realized that Einstein's static universe would actually be unstable because local inhomogeneities would ultimately lead to either the runaway expansion or contraction of the universe. The equilibrium is unstable: if the universe expands slightly, ...
See also:Dark energy, Dark energy - Evidence for dark energy, Dark energy - Nature of dark energy, Dark energy - Cosmological constant, Dark energy - Quintessence, Dark energy - Other ideas, Dark energy - Implications for the fate of the universe, Dark energy - History Read more here: » Dark energy: Encyclopedia II - Dark energy - History |
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