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Originally posted by Off_The_Street
Jupiter is simply not massive enough for its gravitational acceleration to compress the core enough to start fusion, which is what you have to have to power a star.
Originally posted by harddrive21
VikingAnt - I didn't think that Saturn had alot of internal heat...and if it did, shouldn't it be released equally around the planet, not just at one point at each pole?
The infrared detector on the recent Voyager-1 flyby seems to show that the atmosphere of Saturn possesses only about half as much helium as theory would have. The surmise is that the missing helium is still residing in the planet.