GENERAL KNOWLEDGE

Detailed explanation-1: -The patterns of stars seen in the sky are usually called constellations, although more acurately, a group of stars that forms a pattern in the sky is called an asterism . Astronomers use the term constellation to refer to an area of the sky.

Detailed explanation-2: -Almost two centuries later, the Greek astronomer Ptolemy listed the 48 Greek constellations as we know them today. These 48 formed the basis for our modern constellation system. Not only that, but Ptolemy also drew up a catalog of 1022 stars, with estimates of their brightness.

Detailed explanation-3: -constellation, in astronomy, any of certain groupings of stars that were imagined-at least by those who named them-to form conspicuous configurations of objects or creatures in the sky. Constellations are useful in assisting astronomers and navigators to locate certain stars.