Parsecs to Kilometers

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Parsecs

Astronomers used trigonometry to calculate the distance to stars long before the term parsec was coined, but the new unit made it easier to conceptualise unfathomable distances.

A parsec is the distance from the sun to an astronomical object which has a parallax angle of one arcsecond (1/3600 of a degree). The parallax angle is found by measuring the parallax motion (or apparent movement of a star relative to stable, more distant stars) when the star is observed from opposite sides of the Sun (an interval of six months on Earth). The parallax angle is obtained by halving the angular difference in measurements.

Once the parallax angle is established you can calculate the distance to a star using trigonometry, because we know Earth’s distance from the Sun. The distance from the Sun of a body with a parallax angle of 1 arcsecond was thus defined as a unit and, thanks to Turner, named the parsec.

With the parsec defined, deriving and describing huge distances became easy, since a distance in parsecs can be calculated as the reciprocal of the parallax angle in arcseconds (if the parallax angle is 1 arcsecond, the object is 1 pc from the sun. 0.5 arcseconds means the object is 2 pc distant).

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km =
pc
 
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Kilometers

The kilometre is unit of length in the metric system equivalent to one thousand metres.

1Km is equivalent to 0.6214 miles.

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Pársecs a Kilómetros :: Parsecs en Kilomètres :: Parsec in Kilometer :: Parsecs em Quilómetros :: Parsecs a Chilometri :: Parsecs naar Kilometers :: Парсеки в Километры :: 秒差距 到 公里 :: 秒差距 到 公里 :: パーセク から キロメートル :: 파섹에서 킬로미터으로 :: Parsec till Kilometer :: Parsecs til Kilometer :: Parsec til Kilometer :: Parsec do Kilometr :: Parsec a Kilòmetres :: Παρσέκ για Χιλιόμετρα :: Parseki do Kilometry :: Parsek v Kilometer :: Parsec do kilometer :: Parszek to Kilométer :: Парсеки в Километри :: Parsecs em Quilômetros :: Parallaksisekuntit = Kilometrit :: Парсеци у Километри :: Parsekai įKilometrai :: पारसेक्स से किलोमीटर को