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“astronomical spectrographs”
A spectroscope in which the spectra of stars and other celestial objects are recorded on photographic film.
A spectroscope is an instrument for dispersing light; usually, light in the visible range, into a spectrum in order to measure it; such as, a continuous distribution of colored light produced when a beam of white light is dispersed into its components; for example, by a prism.
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astro-, astr-
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grapho-, graph-, -graph, -graphy, -grapher, -graphia
(page 6)
-tron, -tronic, -tronics +
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