What is a star and how does it get energy?

By converting hydrogen in a nuclear fusion

Fusion reactions power the stars and produce all but the lightest elements in a process called nucleosynthesis. Although the fusion of lighter elements in stars releases energy, production of...

Nuclear Fusion

Fusion

Stars generally get their energy from hydrogen. By far the most common source of energy from a star (like our sun) is the nuclear fusion of hydrogen atoms into helium. As long as there is enough...