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Использование термина spectral class на английском
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Make one high open ended roll to determine the star's spectralclass.
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Throughout human history Tau Ceti was a nondescript fifth magnitude star of spectralclass K0.
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First, the star's color is determined by the spectralclass, as shown on the chart.
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A main-sequence star, luminosity one, spectralclass G, right in the middle of the Hertzsprung-Russell diagram.
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The columns each denote a spectralclass, from temperature rating 0 to 9.
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Once that is determined, roll one percentile die to determine the star's relative temperature rating within the spectralclass.
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Once the spectralclass of the primary has been determined, find the stellar type by rolling one percentile die:
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Find the spectralclass along the top of the chart and then roll to find the natural satellite grouping and number:
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The spectralclass (color and temperature) and stellar type (sequence) of any star are determined as per the procedure below.
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The average velocities of the brighter stars of the different spectralclasses, as determined with the D. O.
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Stomatopod crustaceans have complex visual systems containing up to 16 different spectralclasses of photoreceptors, more than described for any other animal.
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The first order of business was to isolate and determine the exact spectralclasses of the most brilliant stars in the vicinity.