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MCQBeginnerOrbits, Gravitation & Dynamics
BAAO — 2017 Astronomy & Astrophysics Challenge
Question 1
In 2015, physicists at the Laser Interferometer Gravitational-Wave Observatory (LIGO) announced the first-ever observation of gravitational waves. What triggered the pulse?
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Source
Source: British Astronomy and Astrophysics Olympiad (BAAO), Astronomy & Astrophysics Challenge 2017. Question text, answer-choice text, and answer were transcribed from the official BAAO paper and solutions PDFs; the explanation and metadata are original.