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I think you're right, but for different reasons: http://progressive.org/op-eds/let-cut-our-losses-on-fusion-e...
Quite so; there is a stable fusion reactor 93 million miles away (the closest good, safe distance), of whose output we could be harvesting much more than we are.
In order to see this, by way of contradiction, suppose a stable, sustained reaction.
1. How much of the heat is exchanged, and how is the rest dissipated? (How would you design a conventional steam generator if the ignition temperature of coal or gas were millions of degrees?) 2. How refuel? (Stars don't need to refuel: how far down does that scale?) 3. How small a breach of containment would destroy the apparatus?