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Planet X-13

Planet X-13 is a planet in the Spaceman Spiff universe featured in a single Sunday strip. It is orbited by at least one ringed moon.

The terrain of the planet appeared to be mostly earthen, with some rocky formations and craters scattered throughout. Its air was breathable.

Planet X-13 was home to a Zorg fortress, which harbored the Zorg ruler. It is unknown whether the Zorg monarch resides on X-13 or was only there temporarily.