The Sun is the star located at the centre of the Solar System. It is a massive sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface …

May 21, 2026 · 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 – in its orbit.

Jun 21, 2026 · 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 mass. The Sun is the …

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, seasons, and …

Mar 11, 2026 · Sun facts including size, temperature, composition, structure, formation, and life cycle of the star at the center of our Solar System.

We study the Sun to learn about how stars work, and to help protect our civilization from solar storms.

Track the Sun’s real-time position anywhere on Earth. See altitude, azimuth, sunrise, sunset, and daylight length with our interactive live Sun tracker.

The Sun is a yellow dwarf star at the center of our solar system. Earth and all other objects in our solar system orbit around the Sun due to gravity – the Sun contains over 98% of all mass in the solar …

Nov 17, 2025 · A clear guide to the Sun’s age, life cycle, and eventual fate. Learn how scientists measure its age and what will happen when the Sun reaches its final stages.

Mar 16, 2022 · The sun is a yellow dwarf star in the center of the solar system, and it is the largest, brightest and most massive object in the system. The sun formed around 4.5 billion years ago.