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  Introduction:  
 

 

The sun is a huge ball of hot, luminous gas like an immense nuclear explosion. It is so vast that it is one million times bigger than earth and contains 99 % of all the materials in the solar system. The Sun is the star at the center of the Solar System.

The Earth and other matter (including other planets, asteroids, meteoroids, comets, and dust) orbit the Sun. Sun by itself accounts for about 98.6% of the Solar System's mass. Its light travels this distance in 8 minutes and 19 seconds. Energy from the Sun, in the form of sunlight, supports almost all life on Earth via photosynthesis and drives the Earth's climate and weather.

The number of sunspots visible on the Sun is not constant, but varies over an 11-year cycle known as the solar cycle. The solar cycle has a great influence on space weather, and is a significant influence on the Earth's climate since luminosity has a direct relationship with magnetic activity.

The SUN assumed a nearly circular orbit about 26,000 light-years from the center of the Milky Way Galaxy and completing one revolution in about 225Ė250 million years (one Galactic year).
 

 

 
  Do you know/ Interesting facts:
  >The sun was formed about 4.57 billion years ago when the rapid collapse of a hydrogen molecular cloud led to the formation of a third generation T Tauri Population I star, the Sun.

>Right now the Sun is in middle age of its life cycle.

>The Sun is also actually a star

>The Sun's mass is 20 x 1026 tones

>In the dark centers of sunspots temperature is drop to about 3427 degrees C

>The Sun is 93 million miles far away from Earth.

>If sun could hollow then 1.3 million Earths can fit inside the sun.

>The surface temperature of sun is around 9,900 degrees Fahrenheit, while the core temperature is 15 million degrees Fahrenheit.

>The age of sun is approximately 4.6 billion years and will burn for another 5 billion years.

>At the core the pressure is 340 billion times the pressure at the Earth's atmosphere.

>At every second the Sun loses 5 million tons of stuff.

>Without the sunís warmth, there would be no life on earth.

>From earth the sun looks bigger than star but if you see it from the planet Pluto, it would look like a bright star in the sky.

>An airplane would take 20 years to reach on the sun.

>If you weigh 100 kg on earth, you would weigh about 2,800 kg on the sun.