* Hydrogen (H): Makes up about 70.6% of the Sun's mass.

* Helium (He): Makes up about 27.4% of the Sun's mass.

These two elements are the main ingredients in nuclear fusion, the process that powers the Sun and gives it its energy.

In smaller amounts, the Sun also contains:

* Oxygen (O)

* Carbon (C)

* Neon (Ne)

* Iron (Fe)

* Silicon (Si)

These elements are trace amounts, but they play a role in various processes within the Sun.