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Stars were classified first by the strength of the hydrogen lines in their spectra, and then by temperature. Which arrangement of stellar types is in order of the strength of th…

Stars were classified first by the strength of the hydrogen lines in their spectra, and then by temperature. Which arrangement of stellar types is in order of the strength of th…
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Stars were classified first by the strength of the hydrogen lines in their spectra, and then by temperature. Which arrangement of stellar types is in order of the strength of their hydrogen lines, from strongest to weakest?

User Artee
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sorry, don't know

sorry, don't know

User Suhrob
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