Origin of Dark Energy: Before the Big Bang

Click For Summary

Discussion Overview

The discussion explores the origins of dark energy, questioning whether it could have existed before the Big Bang, and examines the presence and effects of dark matter and dark energy within our solar system.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants propose that dark energy may not have originated from the Big Bang but could have a prior existence.
  • There is uncertainty regarding the presence of dark energy and dark matter in the solar system, with some participants asserting that they are present and comprise a significant portion of the universe's mass-energy content.
  • One participant suggests that dark matter could be affecting gravitational interactions within the solar system, potentially altering planetary orbits.
  • Another participant questions whether dark energy could be observable within the solar system or if it is only detectable at larger scales, such as between galaxies.
  • Discussions include calculations regarding the estimated mass of dark matter in the solar system, with varying figures presented, leading to uncertainty about its potential effects.
  • Participants express differing views on the detectability of dark matter, with some suggesting that its effects would be negligible due to its low density.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the origins of dark energy or the implications of dark matter in the solar system. Multiple competing views and uncertainties remain throughout the discussion.

Contextual Notes

Participants reference calculations and assumptions regarding the density of dark matter and its distribution, but these calculations are not universally accepted, and the implications of these figures remain unresolved.

richerrich
Messages
33
Reaction score
0
1. Is it possible that dark energy didnt originate from bigbang but from another that precedes the bigbang?

2. Are dark energy and dark matter in our solar system?

Thank you very much
 
Space news on Phys.org
I can't answer question number one because nobody knows and their is no possible way to test that yet. As for question number two the answer is yes. Dark matter and dark energy make up 95% of the universe while the matter we know makes up the rest.
 
95% of the mass-energy content in the Universe.
 
Waveparticle said:
I can't answer question number one because nobody knows and their is no possible way to test that yet. As for question number two the answer is yes. Dark matter and dark energy make up 95% of the universe while the matter we know makes up the rest.

2.1 If so then dark matter must be affecting something in our solar system. Or some observation of gravitational lensing between stars in our galaxy has been observed not just between galaxies. Dark matter may have altered some planet's orbit.

2.2 If dark energy is in our solar system or galaxy could there be any evidence? Is dark energy only observable between galaxies?
 
Last edited:
If so then dark matter must be affecting something in our solar system. Or some observation of gravitational lensing between stars in our galaxy has been observed not just between galaxies. Dark matter may have altered some planet's orbit.

The amount of dark matter in our solar system, if it is similar to the average galactic density, would be about a kilogram or so, I think. Wouldn't be able to affect anything.
 
nicksauce said:
The amount of dark matter in our solar system, if it is similar to the average galactic density, would be about a kilogram or so, I think. Wouldn't be able to affect anything.

Don't know about that, but it is small.

Using the value from [1] for a density of 0.39 GeV/cm^3 and a characteristic solar system scale of about 100AU, I get a total energy ~ 10^35 J, or dividing by c^2, ~10^18 kg. At any rate, this mass corresponds to one of the medium size asteroids in the asteroid belt, roughly 80km in diameter. Considering that measuring the effect of such an object would be near impossible, and the DM is spread over the entire solar system, the chance of any kind of detection event is still nil.


[1]: http://arxiv.org/abs/0907.0018
 
Yeah you're right, I don't know why I had 1kg in my mind. 10^18 kg is the number I get after a quick calculation.
 
Nabeshin said:
Don't know about that, but it is small.

Using the value from [1] for a density of 0.39 GeV/cm^3 and a characteristic solar system scale of about 100AU, I get a total energy ~ 10^35 J, or dividing by c^2, ~10^18 kg. At any rate, this mass corresponds to one of the medium size asteroids in the asteroid belt, roughly 80km in diameter. Considering that measuring the effect of such an object would be near impossible, and the DM is spread over the entire solar system, the chance of any kind of detection event is still nil.


[1]: http://arxiv.org/abs/0907.0018

Thank you very much Nabeshin.
 

Similar threads

Undergrad Questions on the consequence of an evolving dark energy parameter
  • · Replies 1 ·
Replies
1
Views
3K
High School Is Dark Energy Born at the Big Bang or Continually Created?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Dark matter is running out of places to hide!
  • · Replies 17 ·
Replies
17
Views
4K
High School Does dark energy or cosmic inflation explain flatness?
  • · Replies 37 ·
2
Replies
37
Views
6K
Undergrad Dark energy and the kinematic Sunyaev-Zeldovich effect?
  • · Replies 22 ·
Replies
22
Views
3K
Graduate Models without dark energy
  • · Replies 29 ·
Replies
29
Views
4K
Undergrad Expanding universe needs a big bang?
  • · Replies 101 ·
4
Replies
101
Views
9K
Undergrad An apparently obscure question re dark matter
  • · Replies 12 ·
Replies
12
Views
2K
High School Could Matter/Anti-Matter Annihilation Explain Dark Energy and Dark Matter?
  • · Replies 7 ·
Replies
7
Views
3K
High School Questions about the origin and evolution of dark energy.
  • · Replies 8 ·
Replies
8
Views
2K