If they did that, wouldnt they have to predict the amount of UV radiation created that could potentially kill us all? Igniting a star so close would also increase a magnetic attratction that would most certainly pull the moon and the Earth out of orbit once it reached a critical density.....
http://en.wikipedia.org/wiki/Saturn
Well from wikipedia:
The outer atmosphere of Saturn consists of about 93.2% molecular hydrogen and 6.7% helium. Trace amounts of ammonia, acetylene, ethane, phosphine, and methane have also been detected.[13] The upper clouds on Saturn are composed of ammonia crystals, while the lower level clouds appear to be composed of either ammonium hydrosulfide (NH4SH) or water.[14] The atmosphere of Saturn is significantly deficient in helium relative to the abundance of the elements in the Sun.
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In this respect, yes, it is a prime candidate to "burn" in the fusion state, but, there again, in order for the reaction to be sustainable....a sufficient spark over a very long period of time may be necessary, at least until ice core is melted....The gasses would also have to become much more dense...this seems to be the biggest problem...Interesting!!