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Kim Sy Ok
Digital Art - Digital Art
The parsec (symbol: pc) is a unit of length used in astronomy, equal to about 30.9 trillion kilometres (19.2 trillion miles). In astronomical terms, it is equal to 3.26 light-years, and in scientific terms it is equal to 3.09�013 kilometres (1.92�013 miles). The name parsec is "an abbreviated form of 'a distance corresponding to a parallax of one arc second'." It was coined in 1913 at the suggestion of British astronomer Herbert Hall Turner. A parsec is the distance from the Sun to an astronomical object which has a parallax angle of one arcsecond (1⁄3,600 of a degree). In other words, if a straight line were drawn from the object to the Earth, and another line drawn from the object to the Sun, if the angle formed between the two lines is exactly one arcsecond, then the object's distance would be exactly one parsec.
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April 5th, 2013
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