Just after learning that Earth's scientists no longer consider him a planet, an unhappy Pluto takes a visitor from Earth on a tour of the solar system, sharing facts along the way.

This is a classic science fiction novella by Stanley G. Weinbaum that was originally published in Astounding Stories in 1935. This is the only of Weinbaum's stories to be set on the planet Pluto, written only five years after the planet's discovery. The tale starts with a spaceship called Aardkin that gets boarded by the notorious pirate ship the Red Peri. One year on Frank Keene and astrophysicist Solomon Nestor crash land on Pluto and find themselves...