Space Poddity! It's an actual play D&D podcast in the fantasy outer space Spelljammer setting.

In Space Poddity, four adventurers visit the worlds of other actual play shows, under the possibly-horrified supervision of the show's GM. The tone is light, the characters are compelling, and on a cold, clear night you can hear the parody and the meditation on what it means to control the gates to the stars in a dangerous and teeming creative multiverse.