عنوان مقاله [English]
نویسنده [English]چکیده [English]
All the stars and celestial bodies are suspended in space due to gravity. The Sun and other bodies in solar system have emerged gradually. Earth is one of the astonishing realities in universe, because it is exactly at the distance (150,000,000 kilometers) from the Sun that, along with the atmosphere which has surrounded it, has made life on this unique planet possible.