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Parallactic second is the unit of distance because parallactic second is abreviation of per sec.

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12y ago
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3mo ago

The parallactic second is a unit used to measure the time taken for the Earth to rotate by one second of time, which is equal to 0.99726956678 regular seconds. It is a fundamental unit in astronomy for converting right ascension to time.

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Q: What is parallactic second?
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