What is solar system?

solar system


 The solar system-There are eight planets in our solar system and the sun.The eight planets revolve around the sun in their respective orbits.Our solar system is located in outward spiral of  milky way galaxy.
The evolution of solar system-A question sometimes arises in our mind , how were the sun and its companions born ?Some scientists believe that a giant cloud of gases and dust,called Nebula,appeared moving in the space about 4.6 billions of years ago.It cooled gained very fast rotation .The eight balls of gases of different sizes separated from the Nebula.The remaining central mass of nebula changed into a star known as the sun.The eight balls changed into plants.It is believed that satellites formed when small bolls of gases separated from the central mass.

 Galaxies- Though there are billions of celestial bodies spread in the vast universe.They are not uniformly distributed in the space.The countless stars in the universe form  huge clusters .We are living in milky way galaxy. 
Stars- Stars are self-luminous heavenly bodies.The are made-up of hot gases.They generate heat ,light and radiate it in the space.The distance between celestial bodies is usually measure in light year.The nearest star to to the earth is Proxima Centauri.
  Constellation-If you observe the stars in the clear night they appear to form different.The group of stars which are recognised  by their formation are called Constellation.Ursa major also called as the great bear is a constellation of several stars,It appears in  the northern sky.In india the seven stars are called saptrishi mandal.
saptrishi mandal












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