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Optical spectrometer
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===Stellar and solar spectrograph=== The star [[stellar classification|spectral classification]] and discovery of the [[main sequence]], [[Hubble's law]] and the [[Galaxy morphological classification|Hubble sequence]] were all made with spectrographs that used photographic paper. [[James Webb Space Telescope]] contains both a near-infrared spectrograph ([[NIRSpec (Near-Infrared Spectrograph)|NIRSpec]]) and a mid-infrared spectrograph ([[MIRI (Mid-Infrared Instrument)|MIRI]]).
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