A Quote:

"In science-fiction we try not to go contrary to known fact, however thinnly we may spread our speculations about the unknown."

-L.Sprague de Camp, "Design for life"

Semiotics of Science Fiction

http://www.semioticon.com/seo/S/science_fiction.html#

"Mirrors without referents"

An interesting read detailing the symbols and combined symbols used to represent ideas, creations, concepts, and the structure of the science fiction story.