Izzy11111 Izzy11111

03-11-2015
Physics

contestada

Define light year and explain how and why light years are used to measure distances in the universe

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tinmann tinmann

03-11-2015

Light year by definition is the astronomical measurement showing how fast light travels in a year. The speed of light is 299 792 458 metres/second so in a year it can travel over 6 million million miles!
Light years are used to measure distances in the universe because the universe is massive!

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