Introduction

The sun, the moon and all those objects shining in the night sky are called celestial bodies. Some celestial bodies are very big and hot. They are made up of gases. They have their own heat and light, which they emit in large amounts. These celestial bodies are called stars, The sun is a star. Countless twinkling stars in the night sky are similar to the sun. But we do not feel their heat or light, and they look so tiny because they are very very far from us. While watching the night sky, you may notice various patterns formed by different groups of stars. These are called constellations, Ursa Major or Big Bear is one such constellation. One of the most easily recognizable constellations in the small bear orSaptarishi (Sapta-seven, rishi-sages). It is a group of seven stars that forms a part of the large Ursa Major Constellation. people used to determine directions during the night with the help of stars. The North star indicates the north direction, It is also called the Pole Star. It always remains in the same position in the sky. We can locate the position of the Pole Star with the help of the Saptarishi. Some celestial bodies do not have their own heat and light. They are lit by the light of the stars, Such bodies are called planets. The word ‘planet’ comes from the Greek word “Planeta” which means ‘wanderers’. The earth on which we live is a planet, It gets all its heat and light from the sun.