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MCQIntermediateSolar System & Planetary Science
IAAC — 2025 Final Round
Question 5
If the Sun had a diameter of a football (22 cm), what would be Earth’s diameter on this scale?
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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.