These are apparent in-sky size of solar system objects relative to eachother over the next 2 years, with time passing at 10 days each second. We need to specify angles precisely so we use arc seconds: 1° = 60 arc minutes (′) and 1′ = 60 arc seconds (″) — so 1″ = 1/3600° ! pic.twitter.com/xDUUFzE9FL
— Dr James O'Donoghue (@physicsJ) August 11, 2020
via Twitter https://twitter.com/physicsJ
August 11, 2020 at 07:18PM
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