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MCQIntermediateExoplanets & Stellar Systems
USAAAO — 2025 First Round
Question 29
It is observed that a planet orbiting a star increases the observed magnitude of the system by 0.005 when it transits across the star. Assuming that the system is viewed edge on and is orthogonal to the line of sight, determine the radius of the planet Rp in terms of the radius of the star R.
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Source
USAAAO 2025 First Round, Question 29. Question text, choices, and answer were transcribed from the official USAAAO exam and solutions PDFs.