Dup is a planet in the Milky Way galaxy, inhabited by the humanoid Duppi. Puppany plants grow in its temperate regions. Galgo is a popular sport.

Dup was relatively isolated from interplanetary affairs until an expedition by intergalactic biologists Roger and Melissa Grant from planet Earth to visit and study for three years. They published many discoveries, but widest known became the sport of Galgo. Now people from many worlds visit Dup to see the tournaments.