Percent area of the universe is galaxy?

[sketchd2]

%area of the universe is galaxy?

Hi.
I'm trying to determine the approximate percentage of the universe's area that is made up of galaxies for a question I was asked earlier this week. I have been looking everywhere and can not find any information of use. Can someone please help?

 

[Chronos]

Try critical density of the universe.

 

[sketchd2]

Thank you. That is just what I needed

 

[manojr]

Estimated number of galaxies in observable universe is N = 175 X 10⁹, assuming average volume of each 22/7*100000*100000*30000 i.e. v = 9.25 X 10¹⁴ cubic light years. Total volume occupied by galaxies = N X V = 1618.75 X 10²³ cubic light years.

Compare this with volume of observable universe = 4.1 × 10³² cubic light years.

The Hubble Ultra Deep Field shows 10000 galaxies, but still the photo is mostly black (space).

Space is big. Really big. You just won't believe how vastly, hugely, mindbogglingly big it is. I mean, you may think it's a long way down the road to the chemist's, but that's just peanuts to space - Douglas Adams, The Hitchhiker's Guide to the Galaxy

 

[pmacias]

Hello there. I can provide some insights on this question. First of all, it is important to understand that the universe is a vast and ever-expanding space, and it is impossible to accurately determine its exact size or area. Therefore, it is also challenging to determine the percentage of the universe's area that is made up of galaxies.

However, based on current scientific understanding and observations, it is estimated that galaxies make up about 10% of the observable universe. This means that about 90% of the universe is made up of other components such as dark matter and dark energy, which are still not fully understood.

It is also important to note that the distribution of galaxies in the universe is not uniform. They tend to cluster together in groups, clusters, and superclusters. Therefore, the percentage of galaxies in a particular region of the universe may be higher or lower than the estimated 10%.

In summary, while it is difficult to determine the exact percentage of the universe's area that is made up of galaxies, it is estimated to be around 10%. However, further research and observations are needed to gain a better understanding of the universe's composition. I hope this helps.