document.write( "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?\r
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Algebra.Com's Answer #19758 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
[9E20]/[1E16]= [9E4] = 9 x 10^4 yrs.
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