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

Cecilia Payne-Gaposchkin: the woman who discovered what the Universe is made of.
10 August 2015

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.