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Stars spend most of their lives burning hydrogen through nuclear fusion reactions to produce the energy required to remain stable as long as possible. By doing so, two hydrogen atoms are fused together to create a single helium atom and a fair amount of energy. However, at some point in time, the star will begin processing helium and other elements into heavier ones. During their lives, stars are able to produce all elements lighter than iron – including iron; all elements heavier than iron are ... Read »