Anders wrote:
> Arthur C. Clarke had a neat solution: make the beanstalk vibrate
> laterally at a suitable frequency (which can be set by its length) so
> that each time Phobos passes it the beanstalk will be out of the way.
<casual speculation> Could you then use Phobos' gravitational field to
exert a force on the stalk suitable to perpetuate this oscillation? Given
the right frequency of oscillation that seems vaguely plausible. </casual
speculation>
Sarah
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