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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
All About the Sun | NASA Space Place – NASA Science for Kids Our Sun is about 100 times wider than Earth, but it is just an average sized star Astronomers have found some stars that are 100 times bigger than the Sun and others that are 10 times smaller The Sun is also right in the middle of its lifecycle Right now, our Sun is in a stage called yellow dwarf It is about 4 5 billion years old
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
Meet the Sun - Center for Science Education 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 system and so exerts a strong gravitational pull Like other stars, the Sun is a dense ball of gas that creates energy through nuclear fusion reactions in the core, creating helium atoms from hydrogen atoms