How big is the universe at least?
I have often read that the universe must be at least 250 times larger than the visible universe with its approximately 93 billion light-years diameter.
But does that mean 250 times the diameter or 250 times the volume?
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the Planck 2018 data ( https://arxiv.org/abs/1807.06209 ) gives for the balancing density parameter
that gives a minimum radius of a university with a positive curvature according to
of about 400 billion light years.
The universe is 13.8 billion years old, so the visible limit is approx. 13.8 billion Ly. However, WAR already from 13.8 billion years and has removed from us even with overwhelming speed.
One assumes that more than twice, if not 3× is so far away, i.e. 28 MLy, or even 42 MLy.
The volume of a sphere rises cubicly with the radius, ie V~r3.
A triple of the radius thus means an increase to 27 times, since 33=3×3×3=27.
However, that would only be the areas visible to us. There is no reason to assume why the universe would be different beyond the visible range. How far it goes further is pure speculation.
Thanks for your post, but unfortunately you did not answer the question 🙂
In a way!
290× larger is so speculative that it doesn't matter whether it is the diameter, or the volume.
I'd like to have a link that claims.
I do not know a definition of "visible limit" which would be 13.8 billion ly.
the particle horizon (the today's maximum distance from galaxies whose light reaches us today) is about 46 billion ly, the event horizon (the today's maximum distance from galaxies whose light emitted today will ever reach us) at about 16 billion ly.
https://nineplanets.org/questions/how-big-is-the-universe/
https://www.universetoday.com/83167/universe-could-be-250-times-bigger-than-what-is-observable/
https://www.technologyreview.com/2011/02/01/197279/cosmos-at-least-250x-bigger-than-visible-universe-say-cosmologists/
https://gizmodo.com/the-universe-is-at-least-250-times-bigger-than-it-looks-5749332
And much more
The size of the universe is at least 93 billion light years in diameter. Description: The universe is estimated to have a diameter of at least 93 billion light years. This is based on the current observations of the universe, which suggest that the universe expands faster. This means that the universe is becoming ever larger with time and the size of the universe increases. The current observations of the universe indicate that the universe has a diameter of at least 93 billion light years, but is probably much larger.
Thank you for your contribution, but unfortunately you did not answer the question. 🙂
This means the volume.
At least or at most… is SO coming closer to the truth?
"Physical"… it is spatially as "big" as a point without expansion.
If you think more carefully… there are not really physical points.
The problem is the "man" who can only think superficially.
Here's the solution:
The field of consciousness of the spirit is beginningless and indefinable.
I hope ES can help.
While the "conscious field" is the voice in the head, also named Ego in the general public, in the beginning with the birth, the end is limited by death & in between.
Limited by subjectivity, but also only apparent ICH personality.
93. billion light years? That doesn't match the current data… it wasn't 12 billion light years then 2 so 24 billion…
But if I lie wrong you can google
Yep, you lie wrong 🙂
Now I've done it… it's about 14 billion (thus 28 in the expansion) years.
So your 93 billion are still far away from the truth
That's what I've read after, but I haven't had any more shock to answer 🤣
But sadly I wonder how this can be… the universe had a certain size in its "birth"
If no, it should have spread faster like speed of light…
Or I have to read more… read more
No, you obviously confuse the age of the universe (about 14 billion years) with the radius of the observable universe. One has nothing to do with the other.
"The distance to the observation horizon is not, however, due to the Age of the Universe multiplied by the speed of light. So it is not 13.8 billion light years . It is estimated at 46.6 billion light years as part of the Big Bang standard model."
https://de.m.wikipedia.org/wiki/Beobservable_Universum
Infinitely.