The Comet is a zine that was first published in 1930 in the U.S.A. by Raymond Palmer.
The Comet is widely acknowledged as being the first science fiction fanzine ever published. It was edited by Raymond Arthur Palmer and published by the Science Correspondence Club. As the name of the publishers suggests, it has its origins in correspondence between science fiction fans. Naturally, the letter section of The Comet was a prominent feature of the zine, where readers discussed issues concerning science, science fiction and fiction.
The Comet was published for many years, later being renamed Cosmology. Raymond Palmer went on to edit Amazing Stories and Fantastic Adventures and a number of other magazines issued by his own publishing company.