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Message: <blockquote data-quote="Agback" data-source="post: 1035589" data-attributes="member: 5328">G'dayFor a planet to have a fairly stable orbit in a multiple system, it must either orbit one star much closer than that star orbits the others, or else orbit a closely-orbiting pair at a distance that is large compared with their separation. Anything in between results not only in huge climatic ranges and giant tides, but in a chaotic orbit that will either send the planet out into space at escape velocity, or else crash it into a sun, in a time short compared with the time it takes a planet to develop.In the first case the extra suns are basically big bright starts that move very noticeably over decades or centuries. In the second case the multiple suns will always stay close to one another in the sky.As for multiple moons, Mars and the gas giants do fine with them: Mars because Phobos and Deimos are small enough that their gravitation is negligible, and Jupiter and Saturn because their larger moons are fairly well spaced. Earth's comparatively huge moon is something of an anomaly, and if you want your planet to have several such you are going to have either to space them well apart or put them in one another's Trojan points (very implausible). If you space them plausibly far apart, the closer one will produce noticeable tides and the further one will produce negligible tides (tidal 'force' drops off with an inverse cube).Before you comit yourself to anything, Google 'Roche Limit'.Regards,Agback</blockquote>

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