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MCQBeginnerCelestial Coordinates & Time
IAAC — 2021 Final Round
Question 20
Imagine that a total solar eclipse happens on the Earth today. What is the phase of the Moon on this day?
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Source
Source: International Astronomy and Astrophysics Competition (IAAC), Final Round 2021. Question wording and answer-choice text are transcribed from the official training PDF; the explanation and metadata are original.