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MCQBeginnerStellar Astronomy
IAAC — 2023 Final Round
Question 6
How far away from Earth is a star with an observed parallax of 0.1 arcseconds?
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Source
Source: International Astronomy and Astrophysics Competition (IAAC), Final Round 2023. Question wording and answer-choice text are transcribed from the official training PDF; the explanation and metadata are original.