Christmas on Ganymede

There is a human settlement on Ganymede which is run by the Ganymedan Products Corporation, which exports wolframite, karen leaves, and oxite to Earth, and which employs the Ossies as a labor force.

The humans on Ganymede face a crisis caused by Olaf Johnson, who was inspired by the impending Christmas season to tell the Ossies about Santa Claus.

Scott Pelham, the Commander of the base, orders his men to stage a visit by Santa, with Johnson in the starring role.

A flying sleigh is built out of gravo-repulsors and compressed air jets, and eight local animals called spinybacks, after being dosed with brandy to keep them docile, are harnessed to it to serve as reindeer.

Asimov wrote "Christmas on Ganymede" in December 1940; John W. Campbell rejected it and Frederik Pohl's purchase was canceled.