Let us assume that our galaxy consists of 2.5 x ${{10}^{11}}$ stars each out one solar mass

cbse
gravitation

#1

Let us assume that our galaxy consists of 2.5 x ${{10}^{11}}$ stars each out one solar mass. How long will a star at a distance of 50,000 light years from the galactic centre take to complete one revolution ? Take the diameter of milky way to be ${{10}^{5}}$ light years.


#2