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MCQIntermediateStellar Astronomy
IAAC — 2025 Final Round
Question 19
A star has an apparent magnitude of 10.0 and is located 100 pc away. What is its absolute magnitude?
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Source
Source: International Astronomy and Astrophysics Competition (IAAC), Final Round 2025. Question wording and answer-choice text are transcribed from the official training PDF; the explanation and metadata are original.