Factoid time

A light year is 5,865,696,000,000 miles………………….roughly, the nearest star to us not including Sol - Proxima Centauri - is about 4 light years from us……………….23,462,784,000,000 miles. The edge of the known universe is 15 billion light years away. Think of the air miles.

http://www.physlink.com/Education/askExperts/ae502.cfm

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