The main fuel for nuclear fusion in all stars, including our Sun, is hydrogen. More specifically, it is the isotopes of hydrogen: deuterium and tritium. Through the process of fusion, these isotopes fuse together to form helium, releasing a tremendous amount of energy in the process.
The main fuel for nuclear fusion in all stars is hydrogen. More specifically, it is the isotope of hydrogen called "protium," which is the most common form of hydrogen found in the universe.
