When you begin to research your topic in the area of sci-fi, be aware that there are many sub genres that may pique your interest. Here are some points to consider when developing your paper:
SF has a long and colorful history. Depending on your topic, you may wish to search a variety of databases. For example, if you were searching for information about H.G. Wells' War of the Worlds, you should consider searching historical databases such as British Periodicals (1680-1930) where you will find the first original reviews of his book.