In this course, SF (meaning both Science Fiction and Speculative Fiction) is defined as that form of Fantastic Literature that grounds itself on the perspectives of modern science. SF cannot exist without the perspectives afforded by the modern scientific method and its protocols, and the thorough materialism of its procedures and assumptions.
Below is a presentation in PDF form about the history an development of the term "Science Fiction." Read also Ursula K. Le Guin's sharp and wise comments about the role women have (and have not) played in the development of the genre: "American Science Fiction and the Other."
Another PDF below shows the interesting array of categories of SF compiled and organized by Professor C.W. Spinks, retired from Trinity U. of Texas.