Summer Triangle
From Wikipedia, the free encyclopedia.

The Summer Triangle is an astronomical asterism involving an imaginary triangle drawn, during the summer, upon the northern hemisphere's celestial sphere; with its defining vertices at Altair, Deneb, and Vega. This triangle connects the constellations of Aquila, Cygnus, and Lyra.

See also:

• Winter Triangle
• Chinese Valentine's Day

The original article can be found at: http://en.wikipedia.org/wiki/Summer_Triangle.
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