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New Simplicio
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Moderator's note: Spun off from another thread due to topic change.
Isn't Dark Energy a continuous creation theory?
Isn't Dark Energy a continuous creation theory?
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New Simplicio said:Isn't Dark Energy a continuous creation theory?
No, dark energy has a constant density under expansion.New Simplicio said:As the universe expands, won't Dark Energy get diluted ...
New Simplicio said:As the universe expands, won't Dark Energy get diluted and grow weaker?
New Simplicio said:Will it grow weaker at greater distance away?
There is NO material to "add", it's just everything (non-bound systems) moving apart from every thing else in space-time but with the amount of dark energy (whatever it IS) unchanged per unit volume.New Simplicio said:Constant density with increasing volume means adding material. What does density mean?
New Simplicio said:Constant density with increasing volume means adding material.
In a sense yes, but it isn't a material as already stated, it is vacuum energy. As John A. Peacock says in "Cosmological Physics" "the vacuum acts as a reservoir of unlimited energy". So increasing volume means an increasing amount of vacuum energy whereby its density (energy per unit volume) remains constant.New Simplicio said:Constant density with increasing volume means adding material. What does density mean?
New Simplicio said:Is that like the metric expansion of spacetime?
New Simplicio said:Is it true that one can't say that spacetime is expanding, being created, or stretching?
New Simplicio said:Is Dark Energy density constant in the Block Universe?
New Simplicio said:The last question is retracted as unconventional.
Dark energy is a theoretical form of energy that is believed to make up about 70% of the universe. It is thought to be responsible for the accelerating expansion of the universe.
Dark energy was first proposed by scientists in the late 1990s when they observed that the expansion of the universe was accelerating instead of slowing down as expected. This discovery was made through observations of distant supernovae.
Dark energy and dark matter are two different concepts in cosmology. Dark energy is a theoretical form of energy that is believed to be responsible for the accelerating expansion of the universe. Dark matter, on the other hand, is a type of matter that does not interact with light and is thought to make up about 27% of the universe.
Dark energy is thought to be the driving force behind the expansion of the universe. It counteracts the force of gravity, causing the universe to expand at an accelerating rate. Without dark energy, the universe would be expanding at a much slower rate.
Currently, scientists have not been able to directly detect or measure dark energy. However, its effects can be observed through the accelerating expansion of the universe. Scientists are also studying other methods, such as gravitational lensing, to indirectly measure the effects of dark energy.