Our Milky Way galaxy is 100,000 ly in diameter. A
Chapter 27, Problem 25P(choose chapter or problem)
Problem 25P
Our Milky Way galaxy is 100,000 ly in diameter. A spaceship crossing the galaxy measures the galaxy’s diameter to be a mere 1.0 ly.
a. What is the speed of the spaceship relative to the galaxy?
b. How long is the crossing time as measured in the galaxy’s reference frame?
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