Uranometria contained 51 star charts, engraved on copper plates by Alexander Mair ( 1562–1617). The first 48 charts illustrate each of the 48 Ptolemaic constellations. The 49th chart introduces 12 new constellations in the deep southern sky, which was unknown to Ptolemy. Star Tales – Johann Bayer's southern star chart The final two charts are planispheres labeled "Synopsis coeli superioris borea" and "Synopsis coeli inferioris austrina", or (roughly), "Overview of the northern hemisphere" and "Overview of the southern hemisphere".
