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Question: 

You travel to a star 135 light-years from Earth at a speed of $2.90 \times 10^8 \textrm{ m/s}$. What do you measure this distance to be?

Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014. Reprinted by permission of Pearson Education Inc., New York.
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Quick Answer: 

$35 \textrm{ ly}$

Giancoli 7th Edition, Chapter 26, Problem 3

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Chapter 26, Problem 3 is solved.

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