Since its inception in 1978, the organization has administered the Rhysling Award for best science fiction poetry of the year. The award is given in two categories: "Best Long Poem", for works of 50 or more lines, and "Best Short Poem", for works of 49 or fewer lines. It also bestows the Dwarf Stars Award for short poem (up to ten lines). Since the 1980s the Rhysling-winning poems are included in the Nebula Awards anthology published by the Science Fiction and Fantasy Writers of America, along with (since 2008) the Dwarf Stars winning poems. The two awards involve the publication of annual anthologies of nominated works.