Omicron Persei

Omicron Persei is a star in the constellation Perseus. Its eight planet, Omicron Persei 8 is the homeworld of the Omicronians.

Trivia

 * The choice of Omicron Persei is no coincidence, in the plot in "When Aliens Attack", the signal had to be a thousand light years away from Earth for the Omicronians to be able to watch it in the year 2999. The writers choose specifically this star as it was just in the right distance.