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At first I wondered why they're not using the upper part of the rocket to apply the corrective forces. Then I was reminded of the feeling I had when I balanced a broom on a fingertip. You've done that, yeah? You just keep moving the point of support a little tiny bit beyond the center of gravity, and the broom tips back to the center.
The Segway does the same thing, but in only one axis.
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Be Just and Fear Not.
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