An Introduction to the Study of Stellar Structure Quotes

“Actually, under stellar conditions matter is generally so highly ionized that, as we shall see in greater detail in chapter vii, the uncertainty in the chemical composition s essentially due to the uncertainty in the abundance of the two lightest elements, namely, hydrogen and helium. The abundance of the lightest elements, has then to be considered as a fresh parameter in the discussion. We can thus summarize by saying that our fundamental problem is to seek a theoretical relation of the kind

F[L, M, R, abundance of hydrogen and helium] = 0.”
― Subrahmanijan Chandrasekhar, An Introduction to the Study of Stellar Structure