It is a massive, nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light and infrared …

Apr 22, 2025 · The Sun is about 100 times wider than Earth and about 10 times wider than Jupiter, the biggest planet. The Sun is the only star in our solar system. It is the center of our …

Dec 15, 2025 · Sun, star around which Earth and the other components of the solar system revolve. It is the dominant body of the system, constituting more than 99 percent of its entire …

Feb 2, 2024 · The sun is an ordinary star, one of about 100 billion in our galaxy, the Milky Way. The sun has extremely important influences on our planet: It drives weather, ocean currents, …

The Sun is the closest star to Earth and is the center of our solar system. Learn about fun Sun facts.

It holds the solar system together; provides life-giving light, heat, and energy to Earth; and generates space weather. The sun resides some 26,000 light-years from the Milky Way's …

The Sun is the engine behind much of Earth’s environment, providing energy for everything from ocean currents and weather patterns to the plants and algae that form the base of many food …

Sep 25, 2025 · Without light from the Sun, there would be no plants or animals—and, therefore, no food and we wouldn’t exist. Heat and light might be important for life on Earth, but the Sun …

Without the Sun’s energy, life as we know it could not exist on our home planet. From our vantage point on Earth, the Sun may appear like an unchanging source of light and heat in the sky. But …

Dec 17, 2025 · The Sun is the star at the heart of our solar system. Its gravity holds the solar system together, keeping everything — from the biggest planets to the smallest bits of debris …