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MCQIntermediateExoplanets & Astrobiology
BAAO — 2020 Astronomy & Astrophysics Challenge
Question 8
When an exoplanet transits a star, the brightness of the star dims by 0.0557 magnitudes. Let Rₚ be the radius of the planet and Rₛ be the radius of the star. What is the ratio Rₚ/Rₛ?
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Source
Source: British Astronomy and Astrophysics Olympiad (BAAO), Astronomy & Astrophysics Challenge 2020. Question text, answer-choice text, and answer were transcribed from the official BAAO paper and solutions PDFs; the explanation and metadata are original.