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The parsec (symbol: pc) is a unit of length used to measure the large distances to astronomical objects outside the Solar System, approximately equal to 3.26 light-years or 206,265 astronomical units (AU), i.e. 30.9 trillion kilometres (19.2 trillion miles ). [a] The parsec unit is obtained by the use of parallax and trigonometry, and is ...
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Mar 1, 2024 · parsec, unit for expressing distances to stars and galaxies, used by professional astronomers. It represents the distance at which the radius of Earth ’s orbit subtends an angle of one second of arc. Thus, a star at a distance of one parsec would have a parallax of one second, and the distance of an object in parsecs is the reciprocal of its ...
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Sep 11, 2018 · One parsec is approximately 19 trillion miles (30 trillion km). That’s a bit over three light-years . The Voyager 1 probe, launched in 1977, is the most distant manmade object from Earth.
Mar 23, 2009 · Robert Garver, Sanford, Florida. The parsec is a unit for measuring vast astronomical distances based on the parallax effect.
