By using laser frequency combs to stabilize astronomical spectrometers, it may be possible to better understand our expanding Universe.
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Schibli, T. Combs for dark energy. Nature Photon 2, 712–713 (2008). https://doi.org/10.1038/nphoton.2008.240
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DOI: https://doi.org/10.1038/nphoton.2008.240