No, it is usually not a requirement for all attendees to dress in costume. However, anyone not in costume may feel out of place and ostracised. These events are about imagination and creativity and it can be looked at as an insult to not put in the effort.
There are numerous science fiction conventions held each year. The website Wikipedia has a list of such conventions and in many cases a link to the appropriate website for the convention. Most conventions will provide details for registering as a guest or as a vendor.
Unfortunately no. Science fiction has been used to describe some of the most blatant fantasy ever.
Orson Scott Card has a wonderful book called How To Write Science Fiction and Fantasy. Ben Bova has a book called The Craft of Writing Science Fiction That Sells. These books may be at your public library or you can buy them on Amazon. They would be very valuable to explain how to write science fiction. You may also want to attend writer's panels at science fiction conventions and meet other authors, publishers and editors.
Entertainment. Everyone likes a bit of fun.
Science Fiction is a fiction based on science.
Science fiction
Ray Bradbury felt that science fiction was the only literature that dealt with how people should or should not handle technology and that everyone should read it.
"Frankestein" is a Science Fiction novel,or gothic science fiction.
Science fiction is popular especially in the movies. Some of the most popular movies have been science fiction including Gravity, Star Wars, Star Trek, Star Gate, Alien, and Avatar. Locus Magazine is the best source of science fiction news. It lists conventions, awards, and which books are published by authors.
Some would say that science fiction excludes fantasy but Arthur C. Clarke said, "Any significantly advanced technology is indistinguishable from magic. Science fiction authors have mixed science fiction with all other forms of literature. There are science fiction lyrics to songs, science fiction poetry, science fiction mixed with humor, science fiction mixed with westerns, science fiction mixed with romance.
Yes it is Science Fiction
Literature can be classified into genres, which are categories defined by specific characteristics and conventions that distinguish them from each other. Common literary genres include fiction (such as science fiction or historical fiction), non-fiction (such as biographies or essays), poetry, drama, and more. Each genre has its own set of expectations and styles that help to define it within the larger landscape of literature.