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[[Image:61_cygni_map.png|thumb|234px|right|Location of 61 Cygni]]

[[Image:61_cygni_map.png|thumb|234px|right|Location of 61 Cygni]]

'''61 Cygni''', also called '''61 Cygni 2''', '''Bessel's Star''', or '''Piazzi's Flying Star''', is a [[binary star]] located some 11.6 light years from our [[solar system]] in the constellation of [[Cygnus]] near the star [[Deneb]]. The star is famous for it's unusually large proper motion and for being the first star outside our own to be successfully measured using stellar or trigonometric [[parallax]].

'''61 Cygni''', also called '''61 Cygni 2''', '''Bessel's Star''', or '''Piazzi's Flying Star''', is a [[binary star]] located some 11.6 light years from our [[solar system]] in the constellation of [[Cygnus]] near the star [[Deneb]]. The star is famous for its unusually large proper motion and for being the first star outside our own to be successfully measured using stellar or trigonometric [[parallax]].

==History==

==History==

The first discovery of the star was in 1792 by [[Giuseppe Piazzi]]<ref>http://www.daviddarling.info/encyclopedia/A/61Cyg.html</ref>, who later demonstrated the star's unusually large proper motion.  However the star did not become significant in history until 1838, when German mathematician and astronomer [[Friedrich Wilhelm Bessel]] who calculated it's distance using trigonometric [[parallax]], the first star outside our own system to be measured in such a way<ref>http://www.britannica.com/EBchecked/topic/547165/61-Cygni</ref>.  The distance he calculated was so enormous, that the distance could best be adequately explained in the amount of years it took light to reach us from the binary pair.  

The first discovery of the star was in 1792 by [[Giuseppe Piazzi]]<ref>http://www.daviddarling.info/encyclopedia/A/61Cyg.html</ref>, who later demonstrated the star's unusually large proper motion.  However the star did not become significant in history until 1838, when German mathematician and astronomer [[Friedrich Wilhelm Bessel]] who calculated its distance using trigonometric [[parallax]], the first star outside our own system to be measured in such a way<ref>http://www.britannica.com/EBchecked/topic/547165/61-Cygni</ref>.  The distance he calculated was so enormous, that the distance could best be adequately explained in the amount of years it took light to reach us from the binary pair.  

==The Stars==

==The Stars==