The energy of solar energy is the energy from celestial bodies outside the earth (mainly solar energy), which is the huge energy released by the fusion of hydrogen nuclei in the sun at ultra-high temperature. Most of the energy needed by human beings comes directly or indirectly from the sun. Fossil fuels such as coal, oil, and natural gas that we need for our lives are all formed by the plants and animals buried in the ground after a long period of geological time. In addition, water energy, wind energy, wave energy, ocean current energy, etc. are also converted from solar energy.