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The Sun

The Sun. By: Sam Belanger. What is it?. The sun is G2 star Closest star to Earth Contains: hydrogen 70%, 28% helium, metals and other materials 2% Largest object in our solar system Contains 99.8% of the solar systems total mass Cant live without it Estimated 4.5 billion years old.

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The Sun

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  1. The Sun By: Sam Belanger

  2. What is it? • The sun is G2 star • Closest star to Earth • Contains: hydrogen 70%, 28% helium, metals and other materials 2% • Largest object in our solar system • Contains 99.8% of the solar systems total mass • Cant live without it • Estimated 4.5 billion years old

  3. Sun Materials

  4. Characteristics • Diameter: 1,390,000 km( 109 times the earth) • Mass: 1.989e30 kg • Temperature: about 27 million degrees Fahrenheit • 93 million miles away from earth • So large that its gravity is able to hold all of the planets in orbit

  5. Purpose • The sun is necessary for our survival • The light from the sun heats our planet and makes life possible • Eventually in an estimated 5 billion years, the sun will evolve into a red giant star and will no longer heat the earth • Gets its energy from a process called nuclear fusion

  6. Layers • Photosphere: visible surface of the sun that is about 600 km thick • Chromosphere: thin region below the corona, about 3,000 km thick • Corona: forms the sun’s outer atmosphere, and can extend outward a distance equal to 10-12 times the diameter of the sun • Core: the center of the sun, where the energy is produced-temperature around 15,000,000 degrees Celsius

  7. Solar Flares • A solar flare is a basically a huge explosion on the sun • Flares occur when intense magnetic fields on the sun become too tangled • They emit huge bursts of electromagnetic radiation including x rays, ultraviolet radiation, visible light, and radio waves • A sunspot, or a cooler, dark spot on the sun can also appear

  8. Solar Eclipse • Sometimes the moon comes between the Earth and the sun • This event is called a solar eclipse • If the moon is partially over the sun its known as a partial eclipse, or if its completely blocked, a total eclipse • Happen usually once or twice a year • Can be harmful if looked at

  9. Cool Facts • 1 million earths could fit in the sun • The sun’s core is 150 times denser than that of water • The sun is one of about 2 billion stars in the Milky Way galaxy • The suns energy is about 386 billion billion megawatts • A man weighing 60 kg on earth would weigh 1680 kg on the sun • Einstein’s equation E=MC^2 changed ideas about the sun’s energy source by equating mass and energy

  10. Resources • http://www.windows2universe.org/sun/sun.html • http://nineplanets.org/sol.html • http://free.co.uk//sunsets/Landscapes-Road-to-the-Sun/ • Science text book • http://curious.astro.cornell.edu/images/xraysun.gif • http://cosmicpsychic.com/wp-content/uploads/2010/06/TotalSolarEclipse.jpg • http://www.barewalls.com/i/c/602106_Gacrux-the-prominent-red-giant-star-located-in-the-constellation-Crux.jpg • http://www.newscientist.com/data/images/ns/cms/dn9824/dn9824-1_831.jpg

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