Latham, David W. Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts.
Last reviewed:November 2019
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The third brightest star in the sky, apparent magnitude −0.3, and the brightest in the southern constellation Centaurus. It is the closest star to the Sun at a distance of 1.35 parsecs (2.59 × 1013 mi or 4.16 × 1013 km), and its light takes more than 4 years to reach the Earth. It has an unusually large proper motion across the sky of 3.7 seconds of arc per year. See also: Centaurus
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