Notes and Reflections on Books and Media
by Hannah Leitheiser
The Science-history of the Universe, Volume 1
Reading yet another book on astronomy, this one from 1909. They were beginning to connect aurora on Earth with sun spots. They were photographing the corona in the rare moments of eclipse and looking at various spectra. They were aware of hydrogen and helium in the sun's atmosphere (helium is named for the sun since it was first found there).
Big question was: what makes the sun go? It had been proven some time ago that the sun could not burn -- oxidation, even of something so large, wouldn't produce enough energy.