behind the times: viewing the present from the past /

Published at 2016-04-13 22:17:25

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Behind the Times: Viewing the Present from the Past When astronomers estimate the distance between soil and another astrological entity,they often talk in terms of light years. For example, the Alpha Centauri star (that actually comprises three separate stars) is... Read More ›

Source: edoshonin.com

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