The Sun

  • The sun is the largest member of solar system. It is the star at the center of the solar system .
  • The age of the sun is about 5 billion years.
  • The sun is the nearest star to the earth.
  • The surface temperature of the sun is 5778 k or 5504.85 degree Celsius.
  • The temperature at the center of sun is 15,000,000 degree Celsius.
  • The sun and the entire solar system revolve around the center of the Milky way galaxy.
  • It is made up of extremely hot gases (By mass = hydrogen 71%, helium 26.5%, and 2.5% other gases like nitrogen, Oxygen, Sulphur, Silicon, Iron, Magnesium  altogether and  other elements).
  • The visible light of the sun is made up of seven colors violet, Indigo, blue, green, yellow, orange and red.
  • The sun rotates from the west to east and each of the planet revolves around the sun from west to east.
  • It is perfect sphere of hot plasma with internal convective motion that generates magnetic field called dynamo process.
  • Its equatorial diameter is about 1.39 million kilometre or 1200 times that of the earth.
  • The Average distance of the Sun from the Earth is approximately 150 million kilometres.
  • The sun rotates on its axis in 25 days 9 hours and 7 minutes.
  • It is 400, 000 times as bright as the full moon and gives the earth 6 million times as much light as do all other stars put together.
  • The rays of the sun travels at the speed of about 300,000 kilometres per second and take 8.5 minutes to reach the earth.
  • Temperature found on each planet depends on its distance from the Sun. The closer the planet to the sun and the higher is its temperature.
  • Within the sun hydrogen is converted to helium due to nuclear fusion and release a tremendous amount of heat and light.
  • Hydrogen and helium are the main gases present in the sun.
  • The sun’s atmosphere has three layers; the photosphere, the chromosphere and the corona.
  • The sun’s main part has three layers; core, radiative zone and convection zone .

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