Dark energy and the Cosmological Constant

In summary, the Universe expanded rapidly in its first moments and then slowed down. However, it is now accelerating due to the presence of Dark Energy, which is responsible for the accelerated expansion. The cosmological constant, also known as Dark Energy, is constant and has only become dominant in the latter history of the universe. This is because the other influences, such as matter and radiation, have become diluted over time. While the expansion rate of the universe has changed over time, the cosmological constant remains constant. There are other theoretical possibilities for Dark Energy that may not be constant, but the current understanding is that the cosmological constant is responsible for the acceleration of the expansion.
  • #36
This kinda reminds me of the shrinking universe idea. I still prefer the geometric interpretation - purely on the grounds of simplicity. Dark energy makes for a much more complicated universe, IMO.
 
Space news on Phys.org
  • #37
  • #38
Buzz Bloom said:
It involves an alternative to Lambda/Dark Energy which would also cause an acceleration of the Universe expansion.

See my replies in that thread.
 
Last edited:

Similar threads

B Dark energy might not be constant after all
    • Cosmology
Replies
6
Views
418
I Developing Inflation Theory w/o Dark Energy: Alan Guth 1980
    • Cosmology
Replies
1
Views
1K
I Hubble Constant, Dark Energy and the Expanding Universe
    • Cosmology
Replies
2
Views
692
I Does dark-energy require a source of energy?
    • Cosmology
Replies
2
Views
536
A Gravitational Instability and accelerated explanation of Universe?
    • Cosmology
Replies
19
Views
538
A Black hole mass coupled to expansion -- astrophysical source of dark energy?
    • Cosmology
4
Replies
134
Views
6K
I Energy conservation in an expanding universe
    • Cosmology
Replies
2
Views
2K
B History of Cosmology: 1915-1929 | Einstein, Hubble & GR
    • Cosmology
Replies
19
Views
2K
B Does dark energy or cosmic inflation explain flatness?
    • Cosmology
2
Replies
37
Views
3K
I Voids, dark energy and tidal forces...?
    • Cosmology
Replies
0
Views
359

Hot Threads

Recent Insights

Back
Top