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Physics · Topic 17
Astronomy and astrophysics
Year
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2024
2013
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National Preliminary
National One-Eighth
National Quarterfinal
National Semifinal
National Final
Regional Championship
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Sub-topic 1
2024 · National Final
Free
Apparent magnitude as a measure of brightness, and ranking objects by increasing brightness
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Sub-topic 2
2013 · National Preliminary
Premium
Riddle: the moon reflects rather than produces light
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