It's really hard to comprehend how big the universe is (and our tiny place in it). Distances in space are generally calculated by the distance light travels in a certain time. Light travels approximately 300,000 km's a second (a light second). A light year converts to approx Ten Trillion km's. Or if you want to be more accurate, light travels 9,460,730,472,580.8 km's per year. The earth is 1/24th of a light second in diameter, the moon is about a light second away, the sun is roughly 8 light…
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