one billion light years =
5.87849981 × 1021 miles
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A billion years equals a billion years. 1,000,000,000 years
How many hours does it take to get to 4.5 billion km
300 billion seconds is about 9,506.4 years.
If we use the American billion, it is 700 million years. If we use the British billion, it is 700,000 million years.
A light year is a measure of distance, not time. A light year is the distance light travels in one year. In one day light travels 16,081,407,123 miles.