# 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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 Click here to see ALL problems on Miscellaneous Word Problems Question 33404: 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? Thank You.Answer by stanbon(57347)   (Show Source): You can put this solution on YOUR website![9E20]/[1E16]= [9E4] = 9 x 10^4 yrs. Cheers, Stan H.