A colleague asked me today if there was a word for planets that only have one landscape — places like Trantor, the city-planet that ruled Isaac Asimov’s Galactic Empire, or Arrakis, the desert-planet of Dune. These are a very widespread feature of science fiction, and frequently look like symptoms of limited imaginative investment: planets as a single type of place photocopied many times over and pasted onto the face of a very large sphere. In other hands, though, they can work rather well; the fact that all of Arrakis is a desert, one richly imagined, actually adds a great deal to the atmosphere of Dune, even if the ecosystem is a little hard to take seriously.
Thinking about it, I realised that, as far as I could tell, there wasn’t. Tvtropes offers “single-biome planet“, but that doesn’t have quite the right feel for a term of art to be used by fans and critics alike. So I asked a few friends by twitter, and the magnificent Roz Kaveney came up trumps with the word “monocosm”. A monocosm is any big, free-standing thing — often a planet, but possibly something else — based on a single idea or effect. Trantor and Arrakis are planetary monocosms in the most obvious way. See also Hoth and Tatooine.
More subtly (though this may be the only way in which it is subtle), Pyrrus, in Harry Harrison’s Deathworld, is a monocosm of affect rather than landscape, being a planet of danger. The Space Merchants is a monocosm of consumerism. Part of the success of Avatar 2 may lie in the degree to which Pandora is revealed not to be a monocosm. Is Escher’s Print gallery a monocosm? And so on.
It seems to me that this is a word that does something which other words have not, so far, been doing, and thus adds to our abilities to express ourselves. So there it is, a gift to the world, for use in criticism, essays and discussion in convention bars: the monocosm, a Kaveneologism.
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