Distributia
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Lucianne WalkowiczHerself
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Erik ThompsonNarrator
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Alex FilippenkoHimself - Phd., Astrophysicist
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Sean CarrollHimself - Caltech
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Laura DanlyHerself - Phd., Astronomer, Griffith Observatory
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Clifford JohnsonHimself - University of Southern California (as Clifford Johnson)
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Michael MischnaHimself - NASA / JPL
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Laura DanlyHerself - Griffith Observatory