An Etymological Dictionary of Astronomy and Astrophysics

A bright, blue star of V = 2.25 in the constellation → Puppis. It is a hot → supergiant of type O5, with a → surface temperature of 42,000 K, lying 1,400 → light-years away. Naos is one of the rarest → O-type stars visible to the → naked eye.

See also: Naos, from Gk. naos “ship,” since it used to be the Zeta star of Argo Navis (Jason’s vessel Argos) before becoming Zeta in Puppis.