<P> A well known map prepared during the Song Period is the Suzhou Astronomical Chart prepared with carvings of most stars on the planisphere of the Chinese Sky on a stone plate; it is done accurately based on observations and has the supernova of the year of 1054 in Taurus carved on it . </P> <P> Influenced by European astronomy during the late Ming Dynasty, more stars were depicted on the charts but retaining the traditional constellations; new stars observed were incorporated as supplementary stars in old constellations in the southern sky which did not depict any of the traditional stars recorded by ancient Chinese astronomers . Further improvements were made during the later part of the Ming Dynasty by Xu Guangqi and Johann Adam Schall von Bell, the German Jesuit and was recorded in Chongzhen Lishu (Calendrical Treatise of Chongzhen Period, 1628). Traditional Chinese star maps incorporated 23 new constellations with 125 stars of the southern hemisphere of the sky based on the knowledge of western star charts; with this improvement the Chinese Sky was integrated with the World astronomy . </P> <P> Historically, the constellations can be simply divided into two regions; namely the northern and southern sky, whose origins are distinctly different . The northern skies have constellations that have mostly survived since Antiquity, whose common names are based on Classical Greek legends or those whose true origins have now been lost . Evidence of these constellations have survived in the form of star charts, whose oldest representation appears on the statue known as the Farnese Atlas, which has been suggested to be based on the star catalogue of the Greek astronomer, Hipparchus . Southern hemisphere constellations are more modern inventions, which were created as new constellations, or become substitutes for some ancient constellation . e.g. Argo Navis . Some southern constellations were to become obsolete or had extended names that became foreshortened to more usable forms e.g. Musca Australis became simply Musca . </P> <P> However, all the early constellations were never universally adopted, whose popular usage was based on the culture or individual nations . Defining each constellation and their assigned stars also significantly differed in size and shape, whose arbitrary boundaries often lead to confusion to where celestial objects were to be placed . Before the constellation boundaries were defined by the International Astronomical Union (IAU) in 1930, they appeared as simply encircled areas of sky . Today they now follow officially accepted designated lines of Right Ascension and Declination based on those defined by Benjamin Gould in Epoch 1875.0 in his star catalogue known as Uranometria Argentina . </P>

Where did many of the names for the constellations come from
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