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MCQIntermediateLight, Radiation & Spectroscopy
BAAO — 2023 Astronomy & Astrophysics Challenge
Question 3
The recent supernova SN 2023ixf was one of the closest to Earth of the past decade, reaching an apparent magnitude of 10.8 despite being in the galaxy M101, about 21 million light years away. What was the absolute magnitude of this supernova?
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Source
Source: British Astronomy and Astrophysics Olympiad (BAAO), Astronomy & Astrophysics Challenge 2023. Question text, answer-choice text, and answer were transcribed from the official BAAO paper and solutions PDFs; the explanation and metadata are original.