On Wed, Feb 26, 2014 at 4:50 PM, LizR <[email protected]> wrote:

 > Why bother with all these other power sources when you have a fusion
> reactor in the astronomical backyard?
>

Because the energy density decreases with the square of the distance and
the fusion reactor is 93 million miles away, and because the energy drops
to zero for at least half the time.

  John K Clark

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