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The largest of the three sections into which the ancient constellation of Argo Navis, the ship of the Argonauts, was divided by Nicolas Louis de Lacaille in his catalogue of the southern stars published in 1763. Puppis represents the stern, or poop, of the ship. Lacaille wrote that “the poop is separated from the body of the vessel [Carina] by the rudder”, and it is on the rudder that the bright star Canopus is placed.

Puppis has no stars labelled Alpha or Beta because, when Argo Navis was divided up by Lacaille, the original Greek-letter designations of the stars in Argo were retained; Alpha and Beta ended up in the subdivision of Carina. The brightest star in Puppis is in fact second-magnitude Zeta Puppis, called Naos from the Greek word for ‘ship’.



© Ian Ridpath. All rights reserved


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