![]() The megaparsec (Mpc) is commonly used to describe distances of one million parsecs. The centre of the Milky Way is over 8kpc from the earth.Īstronomy – despite the enormous distance it describes, the parsec is a relatively small unit in astronomical terms.A parsec is a distance from the Sun to an astronomical object which has a parallax angle of one arcsecond. A parsec is equivalent to 3.26 light-years. ![]() One parsec is defined as the distance at which one astronomical unit subtends an angle of one arcsecond.
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