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Sun - Wikipedia 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 surface mainly as visible light and infrared radiation with 10% at ultraviolet energies
Sun: Facts - NASA Science Without the Sun’s energy, life as we know it could not exist on our home planet The temperature in the Sun's core is about 27 million degrees Fahrenheit (15 million degrees Celsius) – hot enough to sustain nuclear fusion This creates outward pressure that supports the star's gigantic mass, keeping it from collapsing
In Depth | Sun – NASA Solar System Exploration 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 the Sun is a dynamic star, constantly changing and sending energy out into space
Sun | Definition, Composition, Properties, Temperature, Facts . . . 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 source of an enormous amount of energy, a portion of which provides Earth with the light and heat necessary to support life
Earths sun: Facts about the suns age, size and history | Space Many scientists think the sun and the rest of the solar system formed from a giant, rotating cloud of gas and dust known as the solar nebula As the nebula collapsed because of its gravity, it
The Sun: Facts, size, and fate of Earth’s blazing star Gazing up at the clear blue sky, our eyes are often drawn to the Sun, that magnificent burning orb that illuminates our days, warms our planet, and supports the growth of our food But how much
The Sun, our Solar System’s star | The Planetary Society 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 of gas and dust called the solar nebula
Sun - National Geographic Society The sun has extremely important influences on our planet: It drives weather, ocean currents, seasons, and climate, and makes plant life possible through photosynthesis On Feb 13th at 1738 UT, sunspot 1158 unleashed the strongest solar flare of the year so far, an M6 6-category blast