The Nebula Award is given each year by the Science Fiction and Fantasy Writers of America (SFWA), for the best science fiction or fantasy published in the United States during the previous year. There is no cash prize associated with the award, instead the award itself being a transparent block with an embedded glitter spiral nebula with gemstones cut to resemble planets.
Works first published in the US during the calendar year are eligible, even if they have previously been published elsewhere. SFWA members can recommend works as suggested reading during the year. From November 15 until February 15 of the following year, SFWA members may nominate up to five works per category. The top six nominations in each category appear on the final ballot, with accommodations for ties. Voting takes place between February 20 and March 30. Number of nominations is used as a tie-breaker if necessary: if still tied, the tie stands and both works receive the award.