I have a relatively simple problem that I'm having trouble with.(adsbygoogle = window.adsbygoogle || []).push({});

A ship is going at 0.90 c, over a distance of 80 light years. In my text the method for determining the time spent traveling is:

80 years + (0.1 * 80) = 88 years

This method seems logical, at 0.9 of the speed of light this trip should take 80 years plus that missing 0.1 of the speed of light.

I tried t = d/v :

t = 80 years / (0.9 light years per year)

t = 88.888889

I'm not sure what is going on, I see no logical error with either approach. Any help is appreciated.

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# Homework Help: Time to travel at relativistic speed

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