Our Galaxy,the Milky Way,has a Diameter of About 100 Thousand $\times$

question 69

Multiple Choice

Our galaxy,the Milky Way,has a diameter of about 100 thousand light-years.How many years would it take a spacecraft to cross the galaxy if it could travel at 99% the speed of light?

• A)1.4 \(\times\) 10³ yrs
• B)1.0 \(\times\) 10⁵ yrs
• C)1.4 \(\times\) 10⁴ yrs
• D)7.2 \(\times\) 10³ yrs
• E)None of these is correct.

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