Answer:
Luminosity classes are labeled with Roman numerals from I to V: I are supergiant stars, II are bright giants, III are ordinary giants, IV are subgiants, and V are ordinary main sequence stars. The complete spectral classification for a star is then given by specifying both the spectral class and the luminosity class.
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No two texts have the same or similiar view points
Answer:
It's the last one again
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its been the last one so many times now omg