Nuclei of lighter atoms collide and fuse together to produce nuclei of heavier atoms and release vast amounts of energy in the process —this is the essence of fusion, and also the energy of this process that powers our Sun. Can we harness this process to meet Earth’s energy demands?

Fusion: Powering the Sun

Fusion is the process that powers and drives the production of energy in stars, such as our Sun. The extremely high pressures and temperatures that exist in the core of the Sun, around 15,000,000° Celsius, cause hydrogen atoms to become so hot that they collide with each other and fuse to form helium. During this reaction a large amount of energy is released — the energy that keeps the Sun burning and sustains life on Earth.