Solar Energy

Solar energy

Solar energy is the radiant energy from the Sun's light and heat, which can be harnessed using a range of technologies such as solar electricity, solar thermal energy and solar architecture. It is an essential source of renewable energy, and its technologies are broadly characterized as either passive solar or active solar depending on how they capture and distribute solar energy or convert it into solar power. Active solar techniques include the use of photovoltaic systems, concentrated solar power, and solar water heating to harness the energy. Passive solar techniques include designing a building for better daylighting, selecting materials with favorable thermal mass or light-dispersing properties, and organizing spaces that naturally circulate air.

Solar Energy (journal)

Solar Energy is a peer-reviewed scientific journal and the official journal of the International Solar Energy Society. It covers research on all aspects of solar energy such as photovoltaics and solar heating, but also its indirect usages like wind power or bioenergy. According to the Journal Citation Reports, the journal has a 2025 impact factor of 7.9.

Energy

Energy is the quantitative property that is transferred to a body or to a physical system, recognizable in the capacity to do work and in the form of heat and light. Energy is a conserved quantity – the law of conservation of energy states that the total energy of an isolated system remains constant, although it can be converted in form. The unit of measurement for energy in the International System of Units (SI) is the joule (J).

solar energy

Noun

1. Energy in the form of electromagnetic radiation emitted from the Sun; especially that part of this energy that is converted into usable thermal or electrical energy by man.