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The Constellations of the Summer Triangle

The Constellations of the Summer Triangle
The Constellations of the Summer Triangle
Stars from three constellations in the northern hemisphere form an imaginary triangle – the Summer Triangle, which is an asterism. The constellations Aquila, Cygnus, and Lyra contain the stars Altair, Deneb, and Vega. Together these stars create a nightly picture of a triangle in space.
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