The oldest Chinese astronomy records date to before the Warring States period (476–221 BC).
Because of precession, the positions of the constellations slowly change over time.
By comparing the positions of the 41 constellations against the grid circles, an accurate determination can be made of the epoch when the original observations were performed.
A total of 1,345 stars are drawn, grouped into 257 asterisms.
The date of this chart is uncertain, but is estimated as 705–10 AD.
It contained 56 large, double page star maps and improved the accuracy in the position of the southern stars.
He introduced 11 more constellations (Scutum, Lacerta, Canes Venatici, etc.).
The Uranometria contained 48 maps of Ptolemaic constellations, a plate of the southern constellations and two plates showing the entire northern and southern hemispheres in stereographic polar projection.
The Pole Johannes Hevelius finished his Firmamentum Sobiescianum star atlas in 1690.
During the Song dynasty, the Chinese astronomer Su Song wrote a book titled Xin Yixiang Fa Yao (New Design for the Armillary Clock) containing five maps of 1,464 stars. In 1193, the astronomer Huang Shang prepared a planisphere along with explanatory text.
It was engraved in stone in 1247, and this chart still exists in the Wen Miao temple in Suzhou.
Based upon this information, the constellations were catalogued at A Roman era example of a graphical representation of the night sky is the Egyptian Dendera zodiac, dating from 50 BC.