What is solar system - How earth revolves around the sun

 What is Solar system 

Solar system consist of 8 planets and 1 star.Solar word comes from the sun energy.Solar means sun's energy.Almost all 8 planets are not good for human being and all other live animals like bacteria, viruses, birds, animals etc.The Planet Earth is God gifted planet for all humans, animals and micro organisms.The 8 planets and sun are doing their work from million of years as they don't sleep or change their type of work.The working of all the planets and sun in only one condition makes a family which we known as solar system. 

Almost Every planet has its own moon.The planet Earth has only moon which completes his one revolution around the earth in 27 to 31 days.So the moons are also the part of solar system.Moon plays an important rule for living organisms at Night.

The moon provides necessary light for seeing at night.It also controls the sea water.if the moon comes near or gone far from the earth then the seas on earth will become out of control.it is because the water is stable on earth because the gravity of moon.The gravity of moon is no noticeable for humans or for any other organisms but it is controlling the water of seas. 

How earth revolves around the sun 

The converting of day to night and night to day is because of revolution of earth around the sun.Earth revolves in two types.One type is that it revolves around its center and the other one is that it revolves around the sun.The day and night are because of center revolution of earth.

Before modern science or astronauts it was thinks that the earth is not in round shape.The earth is in rectangular shape But before the coming of science a man performs an experiment.He go in sea with his boat and takes a round all around the world and he reached again on that place where from he was started his journey.it was proved that earth is in round not in rectangular shape. 

The earth completes one revolution around the sun in 365 days.The 365 is also know as the 1 year on earth.There is 12 months in 365 days so the 1 year on earth becomes of 12 months and in days it becomes of 365 days.The Earth is better for all living organisms because the earth has good environment to leave.The Earth has fruited trees to eat fruits but there is no other planet in solar system which is like EarthBut Elon musk (Tesla's owner) is thinking to go on Mars and live there.It may be possible in future but now Earth is Earth and we want to take care of it.