What is constellation definition?

A constellation is a group of stars that forms a recognizable pattern, typically named after an object, person, or mythological figure. There are 88 officially recognized constellations, which cover the entire celestial sphere. The basic function of constellations is to provide a means of identifying stars and their positions in the sky. Constellations have been used for navigation and celestial mapping for millennia, and they are also important in astrology and cultural mythology. The ancient Greeks and Romans developed many of the classic Western constellations, while other cultures, like those in ancient China and India, developed their own systems of celestial mapping. Some of the most famous constellations include Orion, the Big Dipper, and Cassiopeia.