An unusual star system containing five stars has been found by the WASP astronomy project, as reported on the BBC News website here . Multiple star systems occur in two classic science-fiction works. Isaac Asimov's novella Nightfall is set on a world with six suns - as a result night falls only once every few thousand years. Liu Cixin's novel The Three Body Problem, translated from the original Chinese, features a virtual world with three suns in irregular and unpredictable orbits. Both stories explore the impact of these star systems on the civilizations below - in Nightfall, the inhabitants cannot detect stars beyond their system so cannot grasp the size or nature of the Universe, and they have a deep-rooted fear of the dark. The aliens on Liu Cixin's world also struggle to make sense of the Universe, and are striving to find a way to predict their suns' movements so they can prepare for the deadly hot or cold spells that occur when the suns get too close or too far a...