When did scientist begin to understand how the Sun produces all the energy that it does?

Question

Quizplus · Accepted Answer

The process by which the Sun produces energy, nuclear fusion, was not well understood until the 1930s. Before then, scientists had various theories about how the Sun generated its energy, but it was only with the development of quantum mechanics and a better understanding of nuclear physics that the true process of nuclear fusion in the Sun's core was elucidated.

When Did Scientist Begin to Understand How the Sun Produces