Solar energy is a form of renewable energy derived from the sun's radiation. It is a widely known topic in the field of energy production and there are various synonyms available for this natural source of energy. Some of the most common synonyms for solar energy are photovoltaic energy, solar power and solar thermal. Photovoltaic energy involves the conversion of solar energy into an electrical current through the use of solar panels. Solar power refers to the use of solar energy to generate electricity, while solar thermal is the use of solar energy to produce heat. Other synonyms include sustainable energy, clean energy, green energy, natural energy and renewable energy.