The oldest drawings that have been found of constellations are on vases, seals, and game boards from the Sumerians. This indicates that constellations probably were developed during 4000 BC or earlier. An Alexanderian astronomer, Ptolemy, named 48 constellations. 47 still have the same name that Ptolemy gave them.
The first explorers of the South Seas mapped the southern sky at the end of the 16th century. Many people kept adding constellations but people finally decided on 88 constellations.