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puzzylona كسارة الفك ParsecWikipedia. The parsec (symbol pc) is a unit of length used to measure the large distances to astronomical objects outside the Solar System.One parsec is approximately equal to 31 trillion kilometres (3.1 10 13 km) 19 trillion miles (1.9 10 13 mi) or 206 265 astronomical units (au) and equates to about 3.26 ...