<p>This Forbes article <a href="https://www.forbes.com/sites/startswithabang/2019/03/05/how-much-of-the-unobservable-universe-will-we-someday-be-able-to-see/?sh=3e1d5c22f827" rel="nofollow noreferrer">How Much Of The Unobservable Universe Will We Someday Be Able To See?</a>
claims</p>
<blockquote>
<p>The unobservable Universe, on the other hand, must be at least 23
trillion light years in diameter</p>
</blockquote>
<p>Is this so?</p>
<p>Is there a granted minimum known size of the whole universe? (including the non observable part)</p>

CC BY-SA 4.0
2024-04-08T14:10:59.087Z
You can find the size of the observable universe and the minimum size of the entire universe, according to the results obtained by the Planck Collaboration in the thread: https://astronomy.stackexchange.com/a/54658/31201 . Regards
Albert
CC BY-SA 4.0
2024-04-08T14:19:36.227Z
@albert so if I got it right, the diameter would be around 19 times larger than the observable universe? Which is nothing like Forbes claims?
Pablo
CC BY-SA 4.0
2024-04-08T14:33:47.033Z
[Di Valentino+ 19](https://arxiv.org/abs/1911.02087) found from the Planck data alone(i.e. ignoring BAOs, SNe, etc.) a rather high curvature, implying a rather small "whole" Universe only ~3 times larger than the observable, as discussed in [this answer](https://astronomy.stackexchange.com/a/33901/5264).
pela
CC BY-SA 4.0
2024-04-08T17:52:07.457Z
Does this answer your question? [Based off of the study that found the universe has a positive curvature, how big would the whole universe be?](https://astronomy.stackexchange.com/questions/33897/based-off-of-the-study-that-found-the-universe-has-a-positive-curvature-how-big)
ProfRob
CC BY-SA 4.0
2024-04-08T19:50:14.147Z
@profrob based on the comments here the answer to my question seems to be "no, there are different estimates to how large the minimum size the whole universe is" . But may be someone who knows more can say some of those estimates are invalid and only one is valid
Pablo
CC BY-SA 4.0
2024-04-09T00:13:03.077Z
https://astronomy.stackexchange.com/questions/31793/are-there-ways-to-estimate-size-of-the-whole-universe
Mithoron
<universe>
Is there a granted minimum known size of the whole universe? (including the non observable part)
Pablo
# Is there a granted minimum known size of the whole universe? (including the non observable part)

(Asked by: username_0 on 2024-04-08)

This Forbes article [How Much Of The Unobservable Universe Will We Someday Be Able To See?](https://www.forbes.com/sites/startswithabang/2019/03/05/how-much-of-the-unobservable-universe-will-we-someday-be-able-to-see/?sh=3e1d5c22f827)
claims

> The unobservable Universe, on the other hand, must be at least 23
> trillion light years in diameter

Is this so?

Is there a granted minimum known size of the whole universe? (including the non observable part)

**Tags:** universe

> **Comments:**
> **username_1**: You can find the size of the observable universe and the minimum size of the entire universe, according to the results obtained by the Planck Collaboration in the thread: https://astronomy.stackexchange.com/a/54658/31201 . Regards  
> **username_0**: @username_1 so if I got it right, the diameter would be around 19 times larger than the observable universe? Which is nothing like Forbes claims?  
> **username_2**: [Di Valentino+ 19](https://arxiv.org/abs/1911.02087) found from the Planck data alone(i.e. ignoring BAOs, SNe, etc.) a rather high curvature, implying a rather small "whole" Universe only ~3 times larger than the observable, as discussed in [this answer](https://astronomy.stackexchange.com/a/33901/5264).  
> **username_3**: Does this answer your question? [Based off of the study that found the universe has a positive curvature, how big would the whole universe be?](https://astronomy.stackexchange.com/questions/33897/based-off-of-the-study-that-found-the-universe-has-a-positive-curvature-how-big)  
> **username_0**: @username_3 based on the comments here the answer to my question seems to be "no, there are different estimates to how large the minimum size the whole universe is" . But may be someone who knows more can say some of those estimates are invalid and only one is valid  
> **username_4**: https://astronomy.stackexchange.com/questions/31793/are-there-ways-to-estimate-size-of-the-whole-universe  

---

## 0 answers

