Constellations are named patterns of stars. All societies created them. The classical -- "ancient" -- constellations that populate our sky began in the lands of the middle east thousands of years ago, their origins largely lost to time. They passed through the hands of the ancient Greeks, who overlaid them with their legends and codified them in story and verse. During Roman times they were assigned Latin names.
The 48 ancient constellations single out only the bright patterns. From around 1600 to 1800, post-Copernican astronomers invented hosts of "modern" constellations from the faint stars that lie between the classical figures, from pieces of ancient constellations, and from the stars that occupy the part of the southern sky that could not be seen from classical lands. Later astronomers broke the ship Argo into three parts, yielding 50 ancient constellations.
Crux is the smallest of the 88 modern constellations, but is one of the most distinctive. Its name is Latin for cross, and it is dominated by a cross-shaped asterism that is commonly known as the Southern Cross. Southern cross can be seen as a brilliant cross in the southern sky and it show the South Pole.
The Big Dipper, also known as the Plough or the Saptarishi (after the seven rishis), is an asterism of seven stars that has been recognized as a distinct grouping in many cultures from time immemorial. Big Dipper is a group of seven bright stars that forms a pattern of a handle and a bowl. The component stars are the seven brightest of the formal constellation Ursa Major.
Scorpion, sometimes known as Scorpio and Scorpius, is one of the constellations of the zodiac. Its name is Latin for scorpion, and its symbol is (Unicode♏). It lies between Libra to the west and Sagittarius to the east. It is a large constellation located in the southern hemisphere. Scorpion can be seen clearly with its head, long body, tail and stinger between June and August.
Orion sometimes subtitled The Hunter, is a prominent constellation located on the celestial equator and visible throughout the world. It is one of the most conspicuous, and most recognizable constellations in the night sky.Its name refers to Orion, a hunter in Greek mythology. Orion can be seen clearly as a hunter with a belt and sword between December and February. You can see Orion the best in the winter.