Puppis is a
constellation in the southern sky. Puppis, the
Poop Deck, was originally part of an over-large constellation, the ship of "Jason and the Argonauts",
Argo Navis, which centuries after its initial description, was divided into three parts, the other two being
Carina (the keel and hull), and
Vela (the sails of the ship). Puppis is the largest of the three constellations in square degrees. It is one of the 88 modern constellations recognized by the
International Astronomical Union.