Number Girl One

A parsec* is a unit of length used to measure astronomical objects outside the Solar System equal to about 3.26 light-years. What, you ask, is a light-year?

Good question.

A light-year is the distance traveled by light (in a vacuum) in one Julian year (365.25 days), not a unit of time, but of distance. Abbreviated as “ly,” you could say it is love you. Love you for light-years…lyfly, forever.

*pc=648,000/3.14

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