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It is the distance light travels (in a vacuum) in one year.

1 ly = (299,792,458 m/s)(60 s/min)(60 min/hr)(24 hr/day)(365.25 day/year) = N m/year This can be solved for N which is the number of meters light can travel in a vacuum (space) over the course of one year.

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The international definition of a light year uses a Julian year as the basis for the calculation, which is exactly 365¼ days, making the distance 9.46073047 times 10 to the power 15 metres.

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Is an astronimical unit or light-year the larger unit of measure?

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What is larger a astronomical unit or light year?

A light year is larger than an astronomical unit. One astronomical unit (AU) is the average distance between the Earth and the Sun, approximately 93 million miles. A light year is the distance that light travels in one year, which is about 5.88 trillion miles.


An astronmoical unit is a larger distance unit than a light year?

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