What Is Out There

An sf work can be set entirely on the surface of another planet and yet also present wider information about its fictional universe; Poul Anderson's The Day Of Their Return on the planet, Aeneas; Anderson's "The Trouble Twisters" on the planet, Ikrananka.

In "The Trouble Twisters":

the Pirate Suns;

Nicholas van Rijn in Djakarta and Ito Yamatsu in Tokyo Integrate back on Earth;

the Falkayn castle on Hermes;

Adzel and Chee Lan reminiscing about their home planets;

the expanding Polesotechnic League;

the question of how many Earth-like planets there are;

religions on other planets contrasted with Ikranankan demonism;

probably more.