Among the stars in the sky the Sun appears to be the biggest in size because it happens to be the closest star to the earth. It is about 15 crore (150 Million) KMs away from the earth. Its diameter is 1.39 million KMs whereas it is only 12,756 KMs in the case of earth. In other words the sun is about 1.3 million times bigger in size compared to earth. But it weighs only 0.3 million times of earth. Sun’s rays take only 8 minutes and 20 seconds to reach the earth.
The sun and its family of planets take 24 years to make a round of the Milky Way. The central point of the sun has a temperature of nearly 15 million degrees centigrade, while on its surface it is varying between 9000 and 5000 degrees centigrade in four layers. The fourth one called ‘Corona’ not only supports the earth by providing light but also becoming the basis of all the sources of energy to the life systems on earth.
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