Argo Navis [SEP] discoverer or inventor
ζ, and so on. As a result of this breakup, Argo Navis is the only one of the 48 constellations listed by Ptolemy in his "Almagest" that is no longer officially recognized as a single constellation.
In addition, the constellation Pyxis (the mariner's compass) occupies an area near that which in antiquity was considered part of Argo's mast. Some authors state that Pyxis was part of the Greek conception of Argo Navis, but magnetic compasses were unknown in ancient Greek times, and it does not
Argo Navis
Argo Navis (the Ship Argo), or simply Argo, was a large constellation in the southern sky that has since been divided into the three constellations of Carina, Puppis and Vela. The genitive was "Argus Navis", abbreviated "Arg". Flamsteed and other early modern astronomers called the constellation just Navis (the Ship), genitive "Navis", abbreviated "Nav".
It was identified in Greek mythology with the "Argo", the ship used by Jason and the Argonauts that