What are standard internet reference sites for science fiction and fantasy?
- Wikipedia, the famous online encyclopedia
- IMDB, the Internet Movie Database, a database about movies and TV shows
- ISFDB, the Internet Speculative Fiction Database, a bibliographic database of written sf
If you ask about an actor, author, book, movie, shows, etc, and the answer is clearly visible on the entry for that actor/author/… on one of these references sites, then your question will be closed as too basic.
An answer appearing on these sites is not reason by itself to close as general reference; however if a link to a page with the answer appears high in search engine results, and the page doesn't need improvement (with respect to the question), then a "general reference" vote may be appropriate.
These sites are particularly useful for researching answers to questions within these universes; often a good answer will draw from material here (and elsewhere), and may refer the reader to more detailed (wiki-style) material on these sites.
(grouped by original media type)
- Dune (Frank Herbert): Dune Wiki
- A Song of Ice and Fire (G.R.R. Martin): A Wiki of Ice and Fire at Westeros
- Terry Pratchett (Discworld and the rest): L-Space (wiki)
- Orson Scott Card: Ansible
- Harry Potter (J.K. Rowling): Harry Potter Wiki
- J.R.R. Tolkien: Lord of the Rings Wiki, Encyclopedia of Arda, Tolkien Gateway
- Harry Turtledove: Harry Turtledove Wiki
- Battlestar Galactica: Battlestar Wiki
- Doctor Who: Tardis Data Core
- Farscape: Farscape Enyclopedia Project
- Futurama: The Infosphere
- LOST: Lostpedia
- Primeval: Primeval Wiki
- Stargate: Stargate Wiki
- Star Trek: Memory Alpha for canon, Memory Beta for non-canon
- The Hitchhiker's Guide to the Galaxy (Douglas Adams): The Hitchhiker's Guide to the Galaxy
Not yet completed, but the 3rd edition of the Encyclopaedia of Science Fiction will be on-line and free.