No, the Sun is not made of radioactive gases. While the Sun does produce energy through nuclear fusion, which involves radioactive isotopes, it's not made of radioactive gases in the sense that we normally think of.

Here's a breakdown:

* Nuclear Fusion: The Sun's energy comes from nuclear fusion, where hydrogen nuclei fuse together to form helium. This process releases a tremendous amount of energy.

* Radioactive Isotopes: During fusion, some unstable isotopes of hydrogen and helium are created. These isotopes are radioactive, meaning they decay over time, releasing particles and energy.

* Sun's Composition: The Sun is primarily composed of hydrogen (about 71%) and helium (about 27%), with trace amounts of other elements. These elements are not radioactive in their stable forms.

In short, the Sun's energy comes from nuclear fusion, which involves radioactive isotopes, but the Sun itself isn't made of radioactive gases.