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Textbook Expert
Textbook ExpertVerified Tutor
6 Dec 2021

Given information

Percentage of the energy of the universe which is composed of baryonic matter = 5%
Radius of the observable universe( r) = 14 billion light years 
 
 
 

Number of galaxies in the universe,  

Number of Sun-like stars in each galaxy,  

 
 
 
 
 
 
 
 

Step-by-step explanation

Step 1.
We know that
  
 
Thus,  
   
The total mass of the universe,       of the Sun
 
or    
 
or  
 

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