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Cecilia Payne-Gaposchkin: the woman who discovered what the Universe is made of.

10 Aug 2015, 11:24 UTC
Cecilia Payne-Gaposchkin: the woman who discovered what the Universe is made of.
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In this vlog, I talk about Prof. Payne-Gaposchkin, one the most important astronomers of the 20th Century. Thanks to her we know that stars have not the same composition of the Earth and that Hydrogen is the most abundant element in the Universe.

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