Sun ... The Sun is the star at the centre of the Solar System. 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 …

Apr 22, 2025 · The Sun is the only star in our solar system. It is the center of our solar system, and its gravity holds the solar system together. Everything in our solar system revolves around it – the …

1 day ago · A powerful X-class solar flare has launched a fast CME toward Earth, raising the chance of strong geomagnetic storms and vivid auroras tonight.

Jan 11, 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.

Jun 6, 2025 · The sun is the star at the center of our solar system. It's the largest, brightest and most massive object in the solar system, and it provides the light and heat that life on Earth depends on.

We study the Sun to learn about how stars work, and to help protect our civilization from solar storms. Where did the Sun come from? The Sun formed 4.6 billion years ago from a gigantic collapsing cloud …

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 …

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 — in its orbit.

May 12, 2025 · Our Sun formed in a cloud of gas and dust about 4.5 billion years ago. It will continue to consume hydrogen in its core while emitting light and heat for another 5 billion years or so. …

Dec 11, 2025 · Levels of potentially dangerous cosmic radiation in Earth's atmosphere rose to a two-decade high in November after a rare solar super-flare pummeled the planet with high-speed …