SOLUTION: The diameter of the Milky Way disc is approximately 9 x 10^20 meters. How long does it take light, traveling at 10^16 m/year to travel across the diameter of the Milky Way? tha

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Question 76590: The diameter of the Milky Way disc is approximately 9 x 10^20 meters. How long does it take light, traveling at 10^16 m/year to travel across the diameter of the Milky Way?
thanks

Answer by checkley75(3666)   (Show Source): You can put this solution on YOUR website!
9*10^20/10^16=9*10^4 years to cross.
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