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How to calculate the light-years and convert to miles

Question Description

Help me study for my class. I’m stuck and don’t understand.

1. If a galaxy is 1,000 Mpc away, how fast is it receding from us?

2. The Milky Way has a radius of approximately 100,000 light years. How many miles is that? How long would it take you to travel across our galaxy if you were traveling at 50% the speed of light (be sure to show your work for full credit)?


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Final Answer

khakaan (1456)
UIUC

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