The Summer Triangle is an astronomical asterism involving an imaginary triangle drawn on the northern hemisphere`s celestial sphere, with its defining vertices at Altair, Deneb, and Vega, the brightest stars in the three constellations of Aquila, Cygnus, and Lyra, respectively. In the mid to late 20th century, before INS, GPS and other electronic....
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http://en.wikipedia.org/wiki/Summer_Triangle
An asterism, formed by the bright stars Vega in Lyra, Deneb in Cygnus, and Altair in Aquila, which lies high overhead on summer and early autumn evenings at mid-northern latitudes. All three of these white stars have similar surface temperatures, Vega, at 9,500 K, the warmest. Though Vega and Altair...
Found on
http://www.daviddarling.info/encyclopedia/S/Summer_Triangle.html
No exact match found.
