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How far is a light-year?

If you do the math, one light-year is about 9.5 trillion kilometres (5.88 trillion miles). But how can one comprehend and visualise such a huge number? Bruce McClure of Earthsky.org reveals an ingenious way to visualise the said number by way of mathematical coincidence.

It turns out that the number of inches in a mile is equal to the number of astronomical units in a light-year. One astronomical unit is the average distance between the sun and the earth, which amounts to 150 million kilometres or 93 million miles.

Click on the picture above to discover more.

Submitted by Srikar D., Discoverer.

Edited by Mark S.

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