Puppis, the poop deck, was once part of a much larger constellation, Argos Navis, the famous ship of Jason and the Argonauts. Puppis is the largest remnant, and Carina (keel and hull) and Vela (the sails) are the other modern constellations that were once part of Argos Navis. Puppis is located to the south and east of Canis Major, or just behind the dog’s tail. This constellation is visible just a few months of the year because of its far southern placement. It reaches its highest nightfall ascension in March, and is only visible at nightfall just a month or two before and after March. The Milky Way runs through Puppis, which accounts for the star clusters that are found there. M46 and M47 are two Messier clusters than can be seen in the same binocular field of view, and there is a third Messier cluster, M93, in the south of Puppis. There are several NGC star clusters in Puppis as well.
© James R. Johnson, 2014.