fusion reaction

Stars' energy source

A fusion reaction is a nuclear process in which light atomic nuclei combine to form heavier ones, releasing enormous energy.

This is how the sun and other stars generate power—hydrogen atoms fusing into helium.

Fusion differs from fission, which splits heavy atoms apart.

Achieving controlled fusion for power generation remains an elusive goal: Scientists have pursued fusion reactions as a clean energy source for decades.

Opposites
nuclear process type

fusion reactionfission reaction

Nucleus divides into fragments

nuclear fission · fission · atomic fission · splitting the atom · radioactive decay

energy source paradigm

fusion reactioncombustion

Exothermic reaction with oxygen

chemical reaction · coal power

energy transformation direction

fusion reactionendothermic reaction

Process absorbing thermal energy

energy absorption

Family

fusion, reaction, fuse, fused, fuses, fusing, fusible, infuse, infusion

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