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About: Astro-comb     Goto   Sponge   NotDistinct   Permalink

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An Astro-comb is a type of frequency comb used in observational astronomy to increase the resolution of spectrographs. The resulting increase in spectral resolution allows for the detection of small variations in stellar radial velocities caused by smaller orbiting exoplanets (e.g. Earth-mass planets), among other applications. Astro-combs are distinguished from conventional frequency combs by their focus on high repetition frequencies (with mode spacings of ≥10 GHz).