The source of energy that keeps the Sun shining today is .
A)gravitational contraction
B)nuclear fission
C)nuclear fusion
D)chemical reactions

Question

Quizplus · Accepted Answer

The source of energy that keeps the Sun shining today is nuclear fusion, as hydrogen atoms combine to form helium and release energy. Gravitational contraction and nuclear fission were important sources of energy during the Sun's earlier stages of formation, but they are not the primary sources of energy for the Sun today. Chemical reactions cannot release enough energy to power the Sun's immense heat and light output.

The Source of Energy That Keeps the Sun Shining Today