Since her death in 1979, the woman who discovered what the universe is made of has not so much as received a memorial plaque or obituaries mention her greatest discovery…Everyone knows Charles Darwin discovered evolution and Albert Einstein discovered the relativity of time. But when it comes to the composition of our universe, textbooks simply say the most abundant atom in the universe is hydrogen. And no one ever wonders how we know? Cecilia Payne-Gaposchkin, a truly extraordinary woman.
Moon - This image of the Moon was taken by the Galileo spacecraft as it passed by. It is a composite of images taken in three different colors. The color scheme is exaggerated to emphasise composition differences. Blue areas are titanium rich, orange areas are titanium poor and purple areas are iron poor.