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Sun - The Star
   
Rayon vert by ComputerHotline on Flickr

Sun
  • is a star in the center of our solar system.
  • is 4.5 billion years old.
  • will last another 5 billion years from now.
  • is composed primarily of the chemical elements hydrogen and helium; they account for 74.9% and 23.8% of the mass of the Sun in the photo-sphere, respectively

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Sunset in Acapulco by Esparta on Flickr

  • The sun is actually white but because of the atmosphere it appears yellow of orange.

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Sunset & the Thinker by Esparta on Flickr

  • Its surface temperature is approximately 5,778 K (5,505 °C; 9,941 °F)
  • All matter in the Sun is in the form of gas and plasma because of its high temperatures

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over the sun by mindfulness on Flickr

  • The distance of the Sun from the Earth is approximately 149.6 million kilometers
  • At this average distance, light travels from the Sun to Earth in about 8 minutes and 19 seconds
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Mentari pagi 08/08/08 by emrank on Flickr

  • The energy of sunlight supports almost all life on Earth by photosynthesis, and drives Earth's climate and weather
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To Beseech Thee by The Wandering Angel on Flickr

  • The corona is the extended outer atmosphere of the Sun, which is much larger in volume than the Sun itself. 
  • The corona continuously expands into the space forming the solar wind, which fills all the Solar System.
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Apocalypse film by kevindooley on Flickr

  • Effects of solar activity on Earth include auroras at moderate to high latitudes, and the disruption of radio communications and electric power. 
  • Solar activity is thought to have played a large role in the formation and evolution of the Solar System. 
  • Solar activity changes the structure of Earth's outer atmosphere.
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