'Astro-comb' helps search for Goldilocks planet

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Post Doc Chih-Hao Li and Ronald Walsworth with new laser device.
Post Doc Chih-Hao Li and Ronald Walsworth with new laser device.

Harvard scientists have unveiled a new laser-measuring device that they say will provide a critical advance in the resolution of current planet-finding techniques, making the discovery of Earth-sized planets possible.


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