Stars and planetary systems in fiction

The planetary systems of stars other than the Sun and the Solar System are a staple element in much science fiction.

The notion that there might be inhabited extrasolar planets can be traced at least as far back as Giordano Bruno who, in his De l'infinito, universo e mondi (On the Infinite, Universe and Worlds, 1584), declared that "There are then innumerable suns, and an infinite number of earths revolve around those suns, [These worlds are inhabited] if not exactly as our own, and if not more nobly, at least no less inhabited and no less nobly." Allusions to inhabitants of other stars' planetary systems remained rare in literature for some centuries thereafter. One of these is found in Voltaire's Micromégas (1752), which features a traveller from Sirius.

As science fiction became established in the early 20th century, destinations such as the Moon, Mars, Venus, and other bodies within the Solar System began to seem stale. Authors invoked a variety of mechanisms for superluminal travel (or generation starships) and placed their stories on worlds in planetary systems around other stars, an innovation that gave them the freedom to construct exotic fictional planets and themes. This tendency became predominant once the exploration of the Solar System was complete enough to conclusively demonstrate the unlikelihood of any highly developed form of extraterrestrial life here, aside from Humans on Earth.

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