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Let us assume that our galaxy consists of stars each of one solar mass. How long will a star at a distance of 50,000 ly from the galactic centre take to complete one revolution ? Take the diameter of the Milky Way to be ly.

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Mass of our galaxy Milky Way,
1 Solar mass = Mass of Sun
Mass of our galaxy,

Diameter of Milky Way,
Radius of Milky Way,
       

Since a star revolves around the galactic centre of the Milky Way, its time period is given by the relation:
  
     
  
   

     

   
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Question Text
Let us assume that our galaxy consists of stars each of one solar mass. How long will a star at a distance of 50,000 ly from the galactic centre take to complete one revolution ? Take the diameter of the Milky Way to be ly.
Answer TypeText solution:1
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