It was first published in May 1930 by the
Science Correspondence Club in Chicago, Illinois.
The fanzine's original editors were Raymond A. Palmer and Walter Dennis. Its second issue, dated July 1930, was called "?", and was the first issue to refer directly to science fiction. The third issue, dated August 1930, took on its third title, Cosmology, a name it retained for the duration of its publication, which ended in 1933.