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Astronomers arrange the stars into groups called spectral classes (or types) according to the kinds of lines they find in their spectra. These spectral classes are arranged in order of:
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Astronomers arrange the stars into groups called spectral classes (or types) according to the kinds of lines they find in their spectra. These spectral classes are arranged in order of:

User Mike JS Choi
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22 votes

Answer:

Temperature

Step-by-step explanation:

The spectral types are:

O, B, A, F, G, K, M

They are arranged in order from the highest temperature to the coolest temperature

User AvZ
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