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physical object > natural object > celestial body > star > late star > carbon star > C star > N star |
N star comparison table |
Subject | is a kind of | has definition |
---|---|---|
C star | carbon star | Late type giant with strong bands of carbonated molecules (C2, CN, CH) and no metallic oxide bands. Formerly they were called R or N types, the R types being the hotter and the N types the cooler C stars. |
N star | C star | In the old terminology, the cooler C-type stars. |
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