In "Slaughterhouse-Five", what is the name of the alien planet?

In “Slaughterhouse-Five,” the alien planet is named Tralfamadore.

Kurt Vonnegut’s 1969 novel follows Billy Pilgrim, an American soldier who becomes “unstuck in time,” experiencing moments from his life out of sequence. After Billy’s abduction by extraterrestrials, he is taken to Tralfamadore and displayed in a zoo alongside Montana Wildhack, a human film actress.

The Tralfamadorians perceive time differently from humans: they see all moments simultaneously rather than moving through time one instant at a time. Their philosophy helps explain the novel’s recurring response to death, “So it goes,” and its fatalistic attitude toward suffering. Tralfamadore is therefore more than a science-fiction setting; it embodies Billy’s attempt to find order in war, trauma, and mortality.

A common mix-up is confusing Tralfamadore with fictional planets from other works, such as Krypton from Superman or Vulcan from Star Trek. Tralfamadore also appears in several other Vonnegut works, though its role and inhabitants vary between stories.