Our galaxy, the milky way, has a diameter of about 100,000 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 × 103 yrs b. 1.0 × 105 yrs c. 1.4 × 104 yrs d. 7.2 × 103 yrs e. none of these is correct.
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Our galaxy, the milky way, has a diameter of about 100,000 light years. how many years would it take...
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