The Earth and major structural components of earth

EARTH 
The third farthest planet from the sun is earth. The earth rotates on its axis in about 24 hours.
The diameter of earth is 12756 km.The earth completes its rotation along its axis in 23.9 hour and one tip along its orbit in 365 days,6 hours and 9 minutes and 9.4 seconds. The orbit of the earth is not a circle but an ellipse. 
STRUCTURE OF THE EARTH 
The earth has four major structural components. 
1. The Crust 2.The Mantle 3.The Outer core 

The Sun

THE SUN 
The sun is the most significant star for the existence and life of living beings on earth. The whole life on earth depends on this brightest object in the sky. The living things get their energy from sun and the appropriate distance of earth from sun maintains an  appropriate temperature which is ideal for the survival of all the life present on earth. 
The sun is the principle source of energy for all the planets of the solar systems .Through a

Solar System

SOLAR SYSTEM 
The solar system includes nine planets and sun being at the centre. All the planets revolve around the sun .The solar system also includes the asteroids, meteors and numerous comets. All of these travel around the sun in a particular orbit
The planets which are the significant part of the solar

Galaxy and Classes of galaxy

GALAXY 
Galaxy is a huge number of stars groupedtogether. The term galaxy can also be described as a collection of dust, gas and stars measuring thousands of parsecs across.Galzxy contains 10000million stars and looks like a disc with a fat centre and spiral arms. From the front it looks like a convex lens‘s 

Classes of galaxy

Two broad classes of galaxy are there.

Big Bang Theory about the universe

UNIVERSE 
The BIG BANG THEORY about the universe is the most widely acceptable theories with regard to the origin of the universe. According to the big bang, the universe was created sometime between 10 billion and 20 billion years ago from a cosmic explosion that hurled matter and in all directions. All the galaxies were formed from this matter. Observations of these galaxies show that they are still moving apart from each other.
The universe is expanding Some scientists have

Impact of science on society

IMPACT OF SCIENCE ON SOCIETY 
Science is the organization of knowledge in such a way that it commands the hidden potential in nature. This hidden potential is surfaced out by the subject of science through the process of understanding. Science has proved to be of enormous beneficial nature .It has made lasting impact on regarding each and every field of human existence. Whether it is concerned with our day to day lives or whether it is related with the various modern developments which have resulted in elevating the living standards of the individuals.