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Message: <blockquote data-quote="Pbartender" data-source="post: 1742126" data-attributes="member: 7533">A better idea, than turning Jupiter (or any gas-giant) into a star, would be to put the gas giants into the habitable range of the star.For example, build a star system with a Jupiter-like planet at Earth's orbit, a Saturn-like planet just inside Mars' orbit, and a Uranus-like planet just outside Venus' orbit.Each gas giant would have scads of moons, a handful of which could be earth-like, and dozens upon dozens that could be colonized using space-technologies.You could even give one of the gas giants a habitable atmoshperic layer...  At  a certain altitude from even a gas giant, gravity would be about earth-equivalent.  Assuming an breathable oxygen-nitrogen layer at that altitude and the proper weather to keep a temperate climate (you would necessarily need to be close to a sun, though it would help), it could be inhabited, so long as you have the technology to keep your cities suspended in the air (ala Star Wars' Cloud City on Bespin).It's a little fantastic, but can have enough grounding in (pseudo-)science to qualify as the harder sort of sci-fi.Not to mention...  That real-life astromoners have discovered a significant number of planets oribiting other stars that fit this sort of description exactly.  We don't know what their satellites look like, but there are quite a few gas giants orbiting within the 'goldilocks' regions of other stars.</blockquote>