Question:

How long is a lightyear?

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365 day 5 hours and 58.59 seconds.
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the distance light travels in 1 year.

approximately 5,878,499,810,000 miles

that's five trillion, eight hundred seventy-eight billion, four hundred ninety-nine million, eight hundred ten thousand
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A light year is the distance light travels though a vacuum in one year.

exactly 9,460,730,472,580.8 km
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Light years are used to express distance between stars. A light year is the distance the light travels in one year so:

The speed of light is approx. 299,792 km/s or 186,282 Miles,per second.

A year has 365x24x60x60 = 31536000 seconds,

so a light year is 9,460,730,472,580 km or 5,878,625,373,183 Miles.
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A Year!
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distance = speed * time

plug in the numbers and see for yourself.
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a light year is a measurement of distance,not time, it is the distance light travels in a year
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Pretty dang far... 9,460,730,472,580.8 km
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A light year is how far light travels in one year!
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0.305 parsecs if I'm not wrong.
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A little under 6 trillion miles.
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