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MCQBeginnerStars & Stellar Evolution
IAAC — 2020 Final Round
Question 30
Which one is the correct order of spectral classes according to the star’s surface temperature (from high to low)?
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Source
Source: International Astronomy and Astrophysics Competition (IAAC), Final Round 2020. Question wording and answer-choice text are transcribed from the official training PDF; the explanation and metadata are original.