Aurora is an Earthlike planet orbiting the star Tau Ceti (12 ly from Sol). It was the first Spacer planet colonized. As it was highly populated and developed, it was considered the "capital" of the Spacers. Han Fastolfe, the creator of R. Daneel Olivaw, resided here. After the decline of the Spacers, the planet's remaining inhabitants are believed to have emigrated to Trantor. The planet had two moons: Tithonus I and Tithonus II.