Question

what is a constellation?how does the constellation differ from a star?

Answer 1

A constellation is a group of stars that forms an imaginary outline or meaningful pattern on the celestial sphere, typically representing an animal, mythological person or creature, a god, or an inanimate object. Origins for the earliest constellations likely go back to prehistory.

A star pattern that is not officially recognized by the international scientific community (International Astronomical Union) as a constellationis called an asterism. The stars that form asterisms can be part of one or more constellations. For example, the Big Dipper is an asterism within the Ursa Major constellation