Question

what is a constellation? Name any two constellation.

Answer 1

A constellation is a group of stars that form a recognisable pattern in the sky. The two examples of constellations are Ursa Major and Orion.

Answer 2

Constellation is group of stars that make a recognizable pattern and this pattern is named traditionally after its apparent form of that of a mythological figures.
There are many constellations 
Two of the well known constellation are : Orion and Ursa major