The Urantia Paper commenting on this subject states that the most common source of energy generated in the stars comes from the hydrogen-carbon-helium reaction in which carbon is the catalyst for the conversion of hydrogen to helium.
The theory proposing that energy can be generated in this way was worked out independently by Hans Bethe and independently by von Weizsacker in 1938, and published by Bethe in 1939, and now is accepted theory.
REFERENCES: The Urantia Book, page 464; Kaufman, “The Universe”, Hoyle and Norliker “The Physics-Astronomy Frontier”
Urantia Evidence 