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Updated: May 1, 2025
One of these last is nearly identical with the armillae of Tycho; and the other with his "armillae aequatoriae maximae," with which he observed the comet of 1585, besides fixed stars and planets. The discovery by Galileo of the isochronism of the pendulum, followed by Huyghens's adaptation of that principle to clocks, has been one of the greatest aids to accurate observation.
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