<p>Yes. Quoting values from wikipedia (which in turn cites Ade et.al. in Astronomy and Astrophyics 517), the contribution of matter (both Dark and visible matter) is
<span class="math-container">$$Ω_\text{mass} ≈ 0.315±0.018$$</span>
The contribution of photons and neutrinos is small, and within the boundaries of error of the other terms:
<span class="math-container">$$Ω_\text{relativistic} ≈ 9.24×10^{−5}$$</span>
And the contribution of Dark Energy is:
<span class="math-container">$$Ω_Λ ≈ 0.6817±0.0018$$</span></p>
<p><span class="math-container">$$Ω_\text{total}= Ω_\text{mass} + Ω_\text{relativistic} + Ω_Λ= 1.00±0.02$$</span></p>

CC BY-SA 4.0
2020-08-27T19:43:20.743Z
2020-08-27T19:43:20.743Z
James K
<p>It is often said that it seems that the Universe is quite close to critical density (for example <a href="https://astronomy.swin.edu.au/cosmos/C/Critical+Density" rel="nofollow noreferrer">https://astronomy.swin.edu.au/cosmos/C/Critical+Density</a>).</p>
<p>Does this include Dark Energy as well (apart from Dark matter and Baryonic matter)?</p>

<cosmology><universe><dark-matter><dark-energy><fate-of-universe>
Does the critical density of the Universe also include Dark Energy?
Ritesh Singh
# Does the critical density of the Universe also include Dark Energy?

(Asked by: username_0 on 2020-08-27)

It is often said that it seems that the Universe is quite close to critical density (for example <https://astronomy.swin.edu.au/cosmos/C/Critical+Density>).

Does this include Dark Energy as well (apart from Dark matter and Baryonic matter)?

**Tags:** cosmology, universe, dark-matter, dark-energy, fate-of-universe

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## 1 answers

### Answer by username_1 on 2020-08-27. Score: 3 | Accepted answer

Yes. Quoting values from wikipedia (which in turn cites Ade et.al. in Astronomy and Astrophyics 517), the contribution of matter (both Dark and visible matter) is
$$Ω\_\text{mass} ≈ 0.315±0.018$$
The contribution of photons and neutrinos is small, and within the boundaries of error of the other terms:
$$Ω\_\text{relativistic} ≈ 9.24×10^{−5}$$
And the contribution of Dark Energy is:
$$Ω\_Λ ≈ 0.6817±0.0018$$

$$Ω\_\text{total}= Ω\_\text{mass} + Ω\_\text{relativistic} + Ω\_Λ= 1.00±0.02$$


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