constellation is a group of stars that forms a pattern as viewed  by an observer.

Ursa major - is a constellation of the northern hemisphere which is also known as the great bear whose tail and body is what we call as the big dipper.

ursa minor - also known as little bear that contains polaris  is a companion of ursa major

orion - a constellation known as the hunter containing  Rigel and Betelgeuse, which are stars of first magnitude

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