Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy. Using sunlight, these organisms transform carbon dioxide and water into glucose and oxygen. This process is essential for life on Earth, as it provides the oxygen we breathe and serves as the foundation of the food chain. The Solar System consists of the Sun and all celestial bodies that are bound to it by gravity, including eight planets, their moons, and various smaller objects like asteroids and comets. The planets, such as Earth, Mars, and Jupiter, orbit the Sun in elliptical paths. The Solar System formed about 4.6 billion years ago from a giant cloud of gas and dust.