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Exploring The Southern Stars - Full Documentary "Billions and billions" of stars in a galaxy (after a quote often mistakenly attributed to Carl Sagan) is how many people imagine the number of stars you would find in one. Is there any way to know the answer for sure? "It's a surprisingly difficul... More


Added May 2, 2016  

Channel Science & Technology

Duration 60:25   |   views 76383


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Exploring Stars in Our Galaxy - Full Documentary