I Mass & Radiation 3D Distribution in the Universe

[Islam Hassan]

TL;DR Summary

How much of the universe’s mass and radiation is estimated to be where

What percentage of the universe’s A) total mass —including dark matter— and B) radiation energy is estimated to reside in:

• Inter-galactic space covering i) inter-galactic medium and ii) distinct inter-galactic astronomical objects; and
• Galaxies covering iii) inter-stellar gas clouds, iv) stars, v) planets, vi) black holes + AGN’s and vii) other inter-stellar astronomical objects?

IH

 

[phinds]

Have you done any research on this prior to asking the question here? If so, what have you found?

 

[Islam Hassan]

Yes I have, some time ago and I substantially found nothing. I was intrigued by an article I once read somewhere on the net that said that black holes contained the majority of the mass in the universe, which seemed odd. This question has been on my mind since then...recently I said to myself let's try PhysicsForums...

I tried with terms other than "mass/radiation distribution" too because replies to such searches yield composition in terms of ordinary matter, dark matter, dark energy. Localised matter distribution is not easy to find. The Wiki article on inter-galactic medium here does give a % (40%-50%) but for baryonic matter only. I have not come across any reference that provides a complete, comprehensive % estimate of localised mass/radiation distribution.

Perhaps it's a question of terminology; what should one use instead of mass/radiation 'distribution' as a search term?IH

 

[256bits]

I once read somewhere on the net that said that black holes contained the majority of the mass in the universe, which seemed odd.

Black holes contain most of of entropy.

Nevertheless, it has intrigued you to another question.
I suppose you have found articles such as the following
http://chartsbin.com/view/yuc#:~:text=Composition of the Universe , 1 more rows

 

[PeterDonis]

an article I once read somewhere on the net

Can you give a reference? There are lots of random things "somewhere on the net".