<P> Cecilia Helena Payne - Gaposchkin ( May 10 , 1900 -- December 7 , 1979 ) was a British -- American astronomer and astrophysicist who , in 1925 , proposed in her Ph. D. thesis an explanation for the composition of stars in terms of the relative abundances of hydrogen and helium . </P>
<P> Cecilia Helena Payne - Gaposchkin ( May 10 , 1900 -- December 7 , 1979 ) was a British -- American astronomer and astrophysicist who , in 1925 , proposed in her Ph. D. thesis an explanation for the composition of stars in terms of the relative abundances of hydrogen and helium . </P>
who discovered the sun is made of hydrogen
who discovered the sun is made of hydrogen
Cecilia Helena Payne - Gaposchkin
Cecilia Helena Payne - Gaposchkin