SOLUTION: I am also having a problem with this. The diameter of the Milky Way disc is approximately 9x10^20 meters. How lon does it take light, travel at 10^16 m/year to travel across the d

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Question 103941: I am also having a problem with this.
The diameter of the Milky Way disc is approximately 9x10^20 meters. How lon does it take light, travel at 10^16 m/year to travel across the diameter of the Milky Way?

Answer by edjones(8007)   (Show Source): You can put this solution on YOUR website!
9*10^20/10^16=9*10^4=90,000 yrs
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